Which of the following statements is true? moraines form when glaciers pick up large rocks. plucking happens when glaciers deposit rock and sediment. since 1979, the polar ice caps have grown in size about 20%. older glaciers have longer ice crystals than younger ones.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing