A theory is a proposed explanation for an observation
Answer:
The mass number of an atom is its total number of protons and neutrons.
Explanation:
Explanation:
Well i mean clothes so cells make tissues which help organs clothes can technically help you if you fall it has layers so it woulf be as a cell?
I would say A and C. The circulatory system moves blood and nutrients similar to the plant moving water and nutrients. The endocrine system is responsible for hormones, glands and other such functions.
