kanozyo no bentou ha itumo sarada to okazu no baransu ga ii.

の connects nouns and often shows possession or relationship.

So:

• 彼女 = she / her / girlfriend
• 彼女の弁当 = her bento / her lunch box

In this sentence, 彼女の works like her in English.

It can mean different things depending on context:

• she
• her
• girlfriend

In 彼女の弁当, it means something like her or possibly his girlfriend’s. Japanese often leaves this kind of thing to context.

So this sentence could mean:

• Her bento...
• His girlfriend’s bento...

Both are grammatically possible.

This is a very common question.

In this sentence:

• 彼女の弁当は = as for her bento
• バランスがいい = the balance is good

So は marks the overall topic, while が marks the thing that is specifically described as being good.

Structure-wise, it is like:

• As for her bento,
  the balance of salad and side dishes is good.

This kind of topic + subject structure is very common in Japanese.

Because there is no direct object in this sentence.

The main predicate is いい (good), which is an adjective, not an action verb. The sentence is describing a state, not showing someone doing something to an object.

So:

• バランスがいい = the balance is good

Here, バランス is the thing being described, so が is natural.

いつも means always or usually, and it describes the whole statement that follows.

So the idea is:

• Her bento always has a good balance of salad and side dishes.

It is not just modifying サラダ or おかず by themselves. It applies to the condition of the bento overall.

おかず usually means side dishes or dishes eaten with rice.

It does not mean just any side dish in the Western sense. In Japanese, おかず often refers to the food items that go with rice in a meal, such as:

• meat
• fish
• egg dishes
• cooked vegetables
• fried foods

So in a bento context, おかず means the non-rice food items packed in the lunch.

This is a noun phrase built step by step:

• サラダとおかず = salad and side dishes
• サラダとおかずのバランス = the balance of salad and side dishes

The の connects the whole phrase サラダとおかず to バランス.

So it is not:

• salad and the balance of side dishes

It is:

• the balance between salad and side dishes

That whole phrase then becomes the subject of いい:

• サラダとおかずのバランスがいい = the balance of salad and side dishes is good

Here, と is the particle meaning and for joining nouns.

So:

• サラダとおかず = salad and side dishes

This use of と is for listing items together.

いい and よい（良い） are the same word.

• よい is the dictionary/base form
• いい is the very common everyday form

In normal speech and writing, いい is extremely common.

So:

• バランスがいい = natural and common

You may also see 良い, especially in more formal writing, but いい is perfectly standard here.

Both ideas are involved.

Literally, it is:

• the balance is good

But in natural English, the meaning is often closer to:

• it’s well-balanced
• it has a good balance
• the proportions are good

So バランスがいい is a very natural Japanese way to say that the combination or proportions are good.

Because Japanese often uses an adjective as the main predicate of the sentence.

Here, the sentence ends with:

• バランスがいい = the balance is good

That is a complete predicate in Japanese. A separate verb is not necessary.

English often wants something like:

• Her bento always has a good balance...

But Japanese can simply say:

• As for her bento, the balance ... is good.

Yes, basically.

• 弁当 = bento / boxed lunch
• お弁当 = a more polite or softer version

The お is an honorific/polite prefix. In everyday conversation, many people say お弁当, but 弁当 is also completely normal depending on tone and context.

In this sentence, 弁当 sounds plain and natural.

Yes, that is also possible.

For example:

• 彼女の弁当はいつもサラダとおかずのバランスがとれている。

This means something like:

• Her bento is always well-balanced in terms of salad and side dishes.

The nuance is slightly different:

• バランスがいい = the balance is good
• バランスがとれている = the balance is properly maintained / well-balanced

Both are natural, but バランスがいい is simpler and very common.

Correct—normal Japanese writing usually does not use spaces between words.

This sentence would normally be written as:

彼女の弁当はいつもサラダとおかずのバランスがいい。

Spaces are often added in learning materials to make the sentence easier to read and to show where words and particles are.