Please help me with this homework show me how you get it and the answer

step-by-step explanation:

12475909

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.  

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x