The answer will be Fungi and protists
A) genetic drift
<span>I hope I have helped</span>
Well, if I’m not incorrect it should be, molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.
Your first thoracic vertebrate aka T1 controls the nerves in your arms. Therefore, I would go with 'Pushing' as it requires your arms to do it.
The answer is parietal cells because they secrete hydrochloric acid in the stomach.