Answer:
B, the total population size
Explanation:
You have to go off of something to find the future population size. Hope that this helps you and have a great day :)
That is called A. <span>Circular distribution.</span>
Rigid skeletons are formed from materials including chitin (in arthropods), calcium compounds such as calcium carbonate (in stony corals and mollusks) and silicate (for diatoms and radiolarians).
theres a video on Y O U T U B E helped me ace the health class a couple year ago