(04.01 mc) randy used to have poor health. recently, he has lost a lot of weight and has started feeling much better, but he doesn't know which of his life changes contributed to the improvement. which change most likely randy get better health?

He started getting a full night of restful sleep.

Sleep deprivation prevents your immune system from building up its forces. If you don't get enough sleep, your body may not be able to fend off invaders. Long-term sleep deprivation also increases your risk for chronic illnesses like diabetes and heart disease. It also can lead to some mental health and even weight issues like in Randy’s case.

b) the heart is a pump made of muscle and that is difficult to grow in the lab.