Answer for 10 points show work you guys in advanced < 3

A, B, AND D IS THE ANSWER

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.