Changes in society that cause large numbers of people to move up or down the class ladder, which causes one class to increase while others decrease, is called mobility.

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.

answer; regard the action of other people negatively;