I'LL GIVE BRAINLIEST! I'm in 6th grade and this is very difficult for me so, please help me in this. I need this ASAP

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

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.