Which three side lengths could make a triangle?
9 cm, 25 cm, 12 cm
12 cm, 21 cm, 34 cm
14 cm, 6 cm, 18 cm
30 cm, 31 cm, 63 cm

C.

14 cm, 6 cm, 18 cm

Step-by-step explanation:

According to the Triangle Inequality Theorem, the sum of any two sides must be greater than the third side.

To test this with each of your choices, add your two smaller sides together and see if they are greater in length than your largest side.

21 is not greater than 25, so it is not answer choice A.

33 is not greater than 34, so it is not answer choice B.

20 is greater than 18, so answer choice C is correct.

61 is not greater than 63, so it is not answer choice D.

step-by-step explanation:

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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.