What term is used to describe the average kinetic energy of the molecules in a shape?

Temperature is the term used to describe the average kinetic energy of the molecules in a shape. Temperature is used because it is difficult to measure the speed of an individual gas molecule. Kinetic energy is proportional to the speed of the molecules. As the speed of the colliding molecules increases, the total kinetic energy of all the gas molecules also increases. The gas molecules gain energy and move faster and the temperature also goes up.

B. central nervous system; controlled by autonomic reflexes

Answer choices are:

A. central nervous system; also controlled by the central nervous system
B. central nervous system; controlled by autonomic reflexes
C. autonomic nervous system; controlled by autonomic reflexes
D. voluntary; also voluntary
E. involuntary; also involuntary. 

Swallowing has three phases which have different control systems. The oral phase of swallowing is under  the central nervous system control and the pharyngo-esophageal phase is controlled by autonomic reflexes