Question

the energy of random atomic and molecular motion is called reflection. the doppler shift. spectroscopy. heat. displacement.

Explanation:

Heat is the energy associated with the random motion of atoms and molecules. Reflection is about light bouncing off a surface, spectroscopy is the study of the interaction between matter and electromagnetic radiation, the Doppler - shift is related to the change in frequency of a wave due to relative motion between the source and the observer, and displacement is a measure of the change in position of an object.

Answer:

heat.