Babies with very low or very high birthweight are less likely to survive observe a graph of the data

B-stabilizing selection is occurring because the average favored

Explanation:

Low or very high weight are two extremes.

If these two extremes do not survive then only those between these extremes will survive.

We therefore conclude that those babies with an average weight will survive.

The average weight will depend on the two extreme weights.

Therefore,

Stabilizing selection is occurring because the average is favored.

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