Question

how can we prove an object is moving?
a measure its change in position.
b identify its location.
c compare it to another object.
d there is no way to measure motion.

Explanation:

To prove an object is moving, we check if its position changes over time. Option a (Measure its change in position) is correct because motion is defined as a change in position. Option b only identifies location, not motion. Option c comparing to another object isn't a direct proof of its own motion. Option d is wrong as motion can be measured.

Answer:

a. Measure its change in position.