I'm not sure what the lesson is, but the answer that makes sense the most is number. Number because most lessons in subject-verb agreement concerns the singularity and plurality of the subject at hand
Answer:
Personification
Explanation:
You are giving the anger the trait/ability to scream, which qualifies as personification.
Answer:
C. To find out if the call of an animal is missing
Explanation:
The more scientists listen to these kinds of recordings, the more they notice when an expected call is missing.
I hope this helps you in any shape or form.
He appeals his emotions and sentiment to distract his audience from the need of justification in favor of angering them so they agree.