I think the answer is : B. preposition: through; object of the preposition: window
preposition describe a relationship between words in a sentence and the object of the preposition is the head noun within the noun phrase or the noun clause
hope this helps
The correct answer is becoming an astronomy researcher
For starters, it is the only appositive phrase. It is also non-essential because the sentence conveys full meaning even if it was removed.
Hello there.
<span>How long has storytelling existed?
</span><span>D. since humans learned to make sounds</span>
