Answer:
Option C
Step-by-step explanation:
Options:
Option A: a place where the speaker can rest
Option B: the home where the speaker lived
Option C: the place where the speaker is buried
Option D: a garden that the speaker enjoyed
Metaphors is when you are making a comparison between two things without using the words like or as, which a simile is when you are comparing two things while using the words like or as. In this case the word house is mentioned "We paused before a House that seemed" before the author describes a grave because she/he also mentions how it's swelling from the ground, and how the roof is very visible which houses roofs aren't easy to see, she's comparing a house to her headstone. Your answer is option C or "the place where the speaker is buried."
Hope this helps.