wel;l it gives us heat
This question requires a context. Thermal energy exists everywhere. But in general, too much thermal energy leads to overheating.
help us go to sleep and eat and like other people
It keeps the eyes moist which keeps them healthy which lets us see properly which can help us survive.
Sports require exercise, and exercising increases stamina and agility. Stamina and agility is a form of energy, because the higher they are, the more energy you have.
they help us go pee