<span>I believe the Answer is Population.</span>
Answer:
i think bubbles tbh
Explanation: oxygen, carbon dioxide and hydrogen produces bubbles
B. community
hope this helps;)
Over a millions of years of animals and plants being crushed down in the ground<span />
Answer:
C. Vaccination
Explanation:
vaccination is the administration of a vaccine to help the immune system develop protection from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism.
