The answer is adrenal gland
Cumulus clouds are a bunch of low-lying clouds and they look like cauliflower. They are fair weather clouds. And therefore, on seeing them, I would continue lying on the beach. So, your answer is A. Cumulus clouds are puffy and are not sign of bad weather unless they are higher in the atmosphere.
Well your and my stomach is made up of a stomach lining, protecting the rest of the internal organs from the acid. This diagram might help you understand how the cells and how your stomach forms HCL. <span>HCL breaks down proteins in your </span>stomach<span> to prepare them for digestion (like the proteins in milk and meat) and kills bacteria that enter your </span>stomach. It converts the inactive enzyme <span>pepsinogen </span>into the active enzyme pepsin. If you need more information please feel free to ask!
B) they stay the same for many generations