What are some ways to overcome collective action problems?

There are three major types of solutions to collective action problems:

Government regulation: A government can declare it against the law to act selfishly and require individuals to cooperate.

Private ownership: If someone owns a resource, then he or she can restrict access to it. Furthermore, it will be in his or her interest to prevent the resource from collapsing.

Community mobilization: Groups of individuals can work together to foster cooperation.

Explanation:

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.

i believe your answer is mountains.