An atom is smaller than an element.

an element is made of 1 atom

Explanation:

probably an atom is smaller

True

Explanation:

Atom is smaller than Element , Because atoms are smallest indivisible particles of matter and the only substances considered to be smaller than the atom are the sub atomic particle Eg proton electron neutron

a community that experiences major changes undergoes progress

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.