The energy associated with the random motion of molecules or atoms within a substance is a. electromagnetic energy. b. thermal energy. c. gravitational potential energy. d. chemical energy.

Answer-The answer is B Thermal energy

Explanation- The energy associated with the random motion (kinetic energy) of molecules or atoms within a substance is thermal energy. This energy can usually be calculated from temperature measurements. As a sample gets hotter, its thermal energy increases.

Also from study island :D

i can't see the full page, therefore, can't answer it

explanation:

this would be a math