Answer:
1. Lines 16, 17, and 18
the needle a worm
laying tiny eggs
that sink into brown cloth.
2. Lines 46 and 47
feeling Brother Khôi’s eyes burn into my scalp
3. Lines 51 and 52
a mother who has become gaunt like bark
Explanation:
In lines 16, 17, and 18 metaphor was used because the needle was indirectly compared to a worm.
In lines 46 and 47, personification was used because the attribute of a living thing - to burn, was assigned to the eyes. Normally, the eyes do not burn. But in this instance, burning was used figuratively.
In lines 51 and 52, simile was used because mother was compared to a bark that has become gaunt. The connector 'like' was used for this direct comparison.