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1. 5.25 b + 6.5 s
2. 6.5 b + 5.25 s
3. 5.25 b - 6.5 s
4. 11.75 (b + s)

baseballs weigh: 5.25

softballs weigh: 6.5

Its the total no the difference

so 5.25b+6.5s

which is, 1

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.