You can use the modal verbs Can, Could or May.
Answer:
Missing friends
Explanation:
In the first line he compares the leaves to friends that have "fallen" so the answer is missing friends.
Answer:
Simile
Explanation:
A simile is a type of figurative language that compares something to another by using like or as. This example uses "like" those of a stranger. If not a simile than perhaps a metaphor. There is not a-lot of context provided in this question.
