Please tell me an easy explanation on how to answer this correctly.

-3 - - 6 = 3

2 - - 8 = 10

Step-by-step explanation:

You use keep change change. When subtracting negative you get the first number change the sign to the opposite, then change the second numbers sign

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.