Hess expanded on Wegener’s theory of .

Hess proposed the idea that
are places where crust is created

To part A the answer is continental drift :D to Part B the answer is Mid-ocean ridges :D Hope I was helpful

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.

after making a punnet square using bv bv bv bv you will find that the ratio will be 9: 7 or a 128.6% probability.

hope this