The Earth orbits a much larger Sun. Use the relationship between size (mass) and gravity to explain why Earth orbits the Sun and not the Sun around the Earth.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

the answer would be d : p