How molecular motion related with temperature?

Jason is a body builder. despite being more fit, he weighs more than his brother ryan, who is the same height. which is a possible reason? a. jason has more muscle mass than ryan does. b. jason has more body fat than ryan does. c. jason has more muscle mass and body fat than ryan does d. jason has less body fat than ryan does.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse