Effects of opposing to the movement to end slavery

Gag rule.

Explanation:

A gag rule is a rule that limits or forbids the raising, consideration, or discussion of a particular topic by members of a legislative or decision-making body. The most famous example of a gag rule is that in effect in the U.S. House of Representatives from 1836 to 1844, concerning slavery.

answer; i believe the correct answer is (crops);

answer; to save lives and protect property;