Question

select the synonym of the word in bold.
the stray dog that cassie found was so skinny you could see its ribs. she took it to the vet, fed it some good dog food, and now the dog isnt so thin.

Explanation:

To find the synonym of "skinny", we analyze the context. The sentence says the dog was so skinny you could see its ribs, and later it isn't so thin. So "skinny" means very thin, and its synonym here is "thin".

Answer:

thin