It should be C the others really don’t make any sense
I'm not entirely sure what you're talking about, but perhaps you are talking about a yam?
I hate when people do this, explain what the scene is and be more specific.
Pyramus and Thisbe are a couple of young Babylonians in love. Unfortunately, their families totally hate each other. The star-crossed lovers whisper sweet nothings through a crack in the wall that separates their houses, until they eventually can't take it anymore and decide to elope
No, "the" is not a preposition as it does not describe a place in which something is. "The" would be called an article, like "a" or "an".
The answer to your second question, therefore, is D. Joanna hid the gift behind the couch, as "behind" would be the preposition because it describes where the gift is.
I hope this helps!