Can some one please help?

i think its -2/3, ive never done these kind before

Step-by-step explanation:

6x-2=-6

6x=-4

x=-4/6

x=-2/3

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.