Question

a ____ ____ point is a place or object used for comparison to determine if something is in motion.
options: spatial, displacement, reference, relative

Explanation:

The question is about a concept in physics (a subfield of Natural Science) related to motion. A reference point is defined as a place or object used for comparison to determine if something is in motion. The other options: "spatial" relates to space, "displacement" is a change in position, and "relative" is an adjective but not the term for the comparison object here.

Answer:

reference (the option corresponding to "reference", likely the third option in the list shown, but based on the definition, the correct term is reference)