From behind the dim alley, an amorphous figure lurked in the shadows.
Answer: We know for sure that there is an established relationship between Casey and Mabel.
Explanation: "She has met Mabel, a kind elderly blind lady who has asked Casey to spend an hour each day helping her around the house".
The completed analogy would be crocodilian: crocodile
A crocodilian is a family of reptiles that includes alligators, caimans, crocodiles, and 23 other species.
this is how i would write it:
volunteering can make a huge difference in a town.
mayor lin said, “parks are clean due to volunteers”
overall, community service strengthens a city.