Sorry if it’s hard to see . can anybody help me with this ?

5

Step-by-step explanation:

4/4 crosses out and 20/4=5 so x=5

x = 5

Step-by-step explanation:

since the work is already done for you, all you have to do is divide 20 by 4, which gives you 5.

you can also check this answer by multiplying 4 by 5, which would give you 20, further proving the answer.

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.