Which of the following steps of the water cycle is the only step that has to have living organisms in
order to happen?
A. Transpiration
B. Condensation C. Evaporation D. Preci

The answer is ozone layer.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass