watasi ha yuuyake wo minagara syasin wo torimasu.

Each を marks the direct object of a different transitive verb.

• 夕焼けを見ながら: 見る (to see/look at) takes 夕焼け as its object.
• 写真を撮ります: 撮る (to take [a photo]) takes 写真 as its object.

〜ながら attaches to the masu-stem of a verb to indicate two simultaneous actions by the same subject.

• 見ながら = “while watching/looking at.”
• It shows you’re looking at the sunset and at the same time taking photos.

The polite non-past (撮ります) is ambiguous in Japanese:

• It can describe a habit (“I take photos [regularly]…”).
• It can state a general present (“I take photos [whenever this happens]…”).
• It can express a plan or future action (“I will take photos…”).
  Context tells you which meaning fits.

は is the topic marker, meaning “as for me.”

• It sets 私 as the topic of the sentence.
• が would instead emphasize the subject or introduce new information (“It is I who…”), which is less natural here since the speaker is already known.

Yes. Japanese often drops the subject when it’s clear from context.

• Omitting 私は is perfectly natural if the listener understands who is doing the action.

Japanese is a subject-object-verb (SOV) language.

• The main verb almost always comes last.
• Subordinate clauses (like 夕焼けを見ながら) precede the main clause.

Both mean “while doing…” but:

• 〜ながら is common in spoken and everyday Japanese.
• 〜つつ is more formal or written, and often found in literature or formal statements.