Vi beskytter naturen.

Because naturen means the nature. In Norwegian, the definite article is often added to the end of the noun instead of being a separate word in front.

• natur = nature
• naturen = the nature

So in this sentence, naturen is the definite form.

In Norwegian, definiteness is usually expressed by a suffix attached to the noun.

So instead of:

• English: the nature

Norwegian commonly uses:

• naturen

This is one of the big differences from English. The -en ending is what gives the noun its definite meaning here.

Beskytter is in the present tense.

The infinitive is:

• å beskytte = to protect

The present tense is:

• beskytter = protect / protects / am protecting / are protecting, depending on context

So Vi beskytter naturen is a present-tense sentence.

No. In Norwegian, verbs usually do not change for different persons the way they do in English.

For example:

• jeg beskytter = I protect
• du beskytter = you protect
• vi beskytter = we protect
• de beskytter = they protect

The verb form beskytter stays the same. This is much simpler than English verb agreement.

This is the normal Norwegian sentence order for a basic statement:

• Subject + Verb + Object

So:

• Vi = subject
• beskytter = verb
• naturen = object

This matches standard English word order in a simple sentence, which makes it fairly easy to recognize.

Vi is a personal pronoun, specifically the subject form meaning we.

A few related pronouns are:

• jeg = I
• du = you
• han = he
• hun = she
• vi = we
• de = they

In this sentence, vi is the one doing the action.

A rough pronunciation guide for an English speaker is:

• Vi ≈ vee
• beskytter ≈ beh-SHYT-ter
• naturen ≈ nah-too-ren or nah-TUR-en, depending on accent

A few notes:

• y in Norwegian is a vowel that does not exist exactly in English. It is pronounced with rounded lips, somewhat like saying ee while rounding your lips.
• The r is pronounced clearly, though how it sounds can vary by dialect.
• Norwegian pronunciation varies a lot by region, so exact sound details may differ.

Yes, å beskytte is a useful and common verb meaning to protect.

Its basic forms are:

• å beskytte = to protect
• beskytter = protect/protects
• beskyttet = protected (past participle; also used in some past constructions)

If you are learning vocabulary, it is helpful to remember the infinitive with å:

• å beskytte

It is singular.

• natur = nature
• naturen = the nature

If you wanted a plural form, you would need a different structure, but in this sentence it is singular and definite.

Not naturally in the same way. The most idiomatic verb here is beskytte for protect.

There is also å verne, but it is used differently and often appears in expressions like:

• å verne om naturen = to protect/care for nature

So Vi beskytter naturen is straightforward and natural.
If you use verne, you often need om:

• Vi verner om naturen

That has a slightly more protective/caring nuance.

Because this is a normal declarative sentence, so Norwegian uses a period just like English.

• Vi beskytter naturen.

If it were a question, the punctuation would be different:

• Beskytter vi naturen? = Are we protecting nature?

Yes. Norwegian present tense often covers both the simple present and the present progressive that English distinguishes.

So Vi beskytter naturen can mean:

• We protect nature
• We are protecting nature

The exact meaning depends on context.

It is not automatically wrong, but it means something slightly different and is less natural in many contexts.

• Vi beskytter naturen = We protect the nature / nature in a specific or definite sense
• Vi beskytter natur = We protect nature in a more general or less definite way

In practice, Norwegian often prefers naturen in a sentence like this, especially when talking about nature as something recognizable and important in general discourse.