What is a coalition? a political alliance, a powerful army, a military target, or a combat strategy

The correct answer is a: A political alliance.

It actually refers to a group of two or three persons, or states or political and military parties that start working together in partnership to obtain a common purpose

A coalition is a political alliance.

A coalition refers to the alliance of different political parties, factions, states, nations or groups to achieve a particular purpose combined into one body. Usually, this alliance is made for a limited time. It could also make reference to a government that was formed in this way.