The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

Locomotor can be explained as the act of moving from one place to another.

Option A

Explanation:

Locomotor is defined as the ability to wander form one place to another without being stationary. There are different forms of locomotion depending upon the medium through which they travel.

Stationary refers to being stagnant or locked in a particular place no matter whatever change is required to happen. Static is almost similar to stationary which doesn't vary with time.

increase masses, decrease separation

your answer is, orbit around the nucleus