Answer: it is D
Explanation: This is because a complex sentence contains a subordinate clause or clauses which means it has another part of the sentence that supports the first one so in this case "were made out of gold" supports "the prizes"
At once a voice arose among
The bleak twigs overhead
<span>In a full-hearted evensong
</span>Had chosen thus to fling his soul
<span>Upon the growing gloom.</span>
Which one of what? You don't say the choices:)
Since the only way to find out if a line is written in a trimeter, or pentameter, etc. is to count the number of syllables, and then divide that number by two to get the meter, that is exactly what we are going to do here.
This line has 8 syllables: (a tree whose hung- ry mouth is prest), we should divide it by 2, which equals 4.
So, the correct answer is that this line is an example of iambic tetrameter. Tetra means 4.
Really it depends upon what the author makes it. If it's a published book, it's a for entertaining purposes. If it was informal, it's be a biography.