The answer for the picture put up is D, not C.
D is the correct answer.
Walking, running, any exercise that increases heart rate
In adulthood, approximately 8% of the fat cells die yearly, they are then replace by new ones. The result of this is that adults develop a constant number of fat cells, this applies to those who gain more weight and those who lose masses of weight. What causes the body weight to rise and fall is the volume of fat cells.
Protein receptors in the nucleus or cytoplasm.