The nuclear forces are made up of which two forces?
a. electromagnetic force and gravity
b. kinetic force and gravity
c. mass defect and nuclear binding energy
d. the strong force and the weak force

C) mass defect and nuclear binding energy

Explanation:

An atom is composed of three fundamental subatomic particles: protons, neutrons and electrons. While the protons and neutrons reside inside the nucleus of the atom, the electrons revolve around it in fixed orbits.

Nuclear force is the force of attraction between protons and neutrons present in the nucleus. It is made of the nuclear binding energy which hold the nucleons together and the mass defect which represents the change in the masses as the nucleus undergoes radioactive decay.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.