Answer:
B. reasons for the differences between social learning in birds and in mammals.
Explanation:
The passage is trying to elucidate or establish the reasons why there are differences between social learning in birds and animals.
The opposite of allow is permit so the opposite of find is to lose.
You could write about something that happened in your life; maybe a vacation or your favorite hobby that might have had a rare detail that may never happen to someone else while they do that same hobby.
Hope I helped! :)
Answer:
A exchange rate ??? Don't know whether is correct or not
Answer:
I would say cheerful or sociable.
Explanation:
Those two words are the opposite of sullen's meaning: depressed, moody, or glum.