What is Electron Microscopy?

electron microscopy (EM) is a technique for obtaining high resolution images of biological and non-biological specimens.

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.

answer; polycythemia is the correct answer;