19.
Mr. Reid’s seventh grade students had a positive
on his life!

Impact?

Explanation:

Well considering the way this is written i would say impact fits best

Mr. Reid's seventh grade students had a positive effect on his life.

Explanation:

The difference between affect and effect is that affect is a verb – “to affect” – meaning to influence or have an impact on something, while effect is the noun – “an effect (a positive or a negative effect) is the result of being affected by something. In this case, effect would be grammatically correct to use for the sentence, since the students are the ones affecting his life.

in "letter from a birmingham jail," king argues that there are four basic steps in any nonviolent campaign: "[c]ollection of the facts to determine whether injustices exist; negotiation; self purification; and direct action." finally, direct action is taken and acts such as boycotts and sit-ins are staged.

ccd puts the honeybee populations and crop health at risk.

the above detail from paragraph 2 supports the inference about honeybee.