Answer:
C. Strong nuclear force.
Step-by-step explanation:
First, let's review the definitions of the given concepts of the group of answer choices:
- Electrostatic force: It's the interaction that occurs between electrically charged particles (positive and negative charges).
- Force of gravity: is a fundamental interaction where there is a mutual attraction between all things that have mass or energy.
- Strong nuclear force: is what keeps nuclei together (protons and neutrons together).
- Weak nuclear force: this force is responsible for particle decay.
Based on these definitions, the force that holds the nucleus together would be C. Strong nuclear force.