Answer:
A and C.
Explanation:
They are similar to the question and makes sense
Answer:
Bacteria helps digest food, make vitamins, and play other important roles
Answer:
bacteria and parasite sewage, industrial waste, and chemicals.
Explanation:
For the first one, electrons travel around the nucleus in fixed energy levels with varying energies.
Second one, protons, neutrons, and electrons have a mass, but electrons have far less mass
Third one, cations and protons
Fourth, not sure.
