Question

economic sanctions are mainly used to
protect domestic industries from international competitors.
help domestic industries gain more business.
punsh nations for disobeying international law.
encourage nations to give up their nuclear weapons.

Explanation:

Economic sanctions are often imposed as a form of punishment on nations that violate international law, norms, or engage in activities considered unacceptable by the sanction - imposing countries. While they can have secondary effects like protecting domestic industries or influencing nuclear - related behavior, their main purpose is often to punish for law - breaking.

Answer:

punish nations for disobeying international law.