Find the approximate value of a.

4.7 rounded to tenth or 4.69 rounded to hundredth

Step-by-step explanation:

Sin23 = a/12. Opposite side over hypotenuse

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.