Where does the Strong Nuclear Force come into play? (d) What is Cosmology?

The strong nuclear force holds most ordinary matter together because it confines quarks into hadron particles such as the proton and neutron. Cosmology is a branch of astronomy that involves the origin and evolution of the universe, from the Big Bang to today and on into the future.

Explanation:

The strong nuclear force is responsible that protons in the nucleus of the atoms do not repeal each other.