Final answer:
The subject is Physics and it is at a High School level. The correct answer is c. Gravitational motion.
Step-by-step explanation:
The subject of this question is Physics and it is at a High School level.
The correct answer to the question is c. Gravitational motion.
Gravitational motion refers to the motion of a particle under the influence of gravitational forces. In this case, the particle is moving along a line joining two stationary masses, which means it is experiencing the gravitational attraction of those masses. An example of this type of motion is the orbit of a planet around the sun or the motion of a satellite around Earth.