As a plant grows, the stem often becomes thickened and somewhat woody since it is responsible for supporting the upper branches and leaves. cells in this area of the plant develop

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

i believe the correct answer is d