Which is an example of the gravitational force?

a. a basketball that was thrown in the air falls to the ground.
b. the particles that make up the neutrons in an oxygen atom are held together.
c. a radioactive element, uranium, decays and becomes stable.
d. the molecules that make up olive oil stick together.

Option (A) is the correct answer.

Explanation:

Force of gravity is defined as the force of attraction acted by the Earth or ground on objects with mass.

For example, when a basket ball is thrown into the air falls to the ground because force of gravity is pulling it towards itself.

Thus, we can conclude that a basketball that was thrown in the air falls to the ground.  

heat a spark and oxygen

there’s no image attached but i can if you want: )