Explain How Has The Earth's Processes Changed The Population Of Organisms

How has the earth’s processes changed the population of organisms?
The earth has been changing since the time it was created, so it’s quite easy to see how this has changed the things living on it. For example earthquakes changing the crust of the earth. The earth changing and affecting the population would be comparable to drawing a blue circle then drawing red on top of it. Of course the color changes, and can’t go back to how it was. There are many causes of the earth changing, natural disasters and the extinction of dinosaurs,evolving multicellular life, and the Ice Age.
In the past 4.6 billion years our earth has dramatically changed, from the beginning of earth (not exactly how we imagine it), to 3 billion years ago which was the first sign of multicellular life. From where we are now the life on earth has been changed several times.
We all know the event plain and simple, but do you actually know what happened? It started in the Jurassic time, the Mesozoic era, and we are at the Yucatán Peninsula in Mexico right off the bright blue waters of the Gulf of Mexico. In this moment imagine a colossal asteroid the size of St.George school--wait, even bigger than that! A mountain. The mountain sized asteroid came hurtling towards earth at 40,000 miles per hour, this caused a crater to form on the earth’s crust more than 115 miles wide. Then the rock was vaporized and set off a chain reaction causing 80 percent of the earth on life gone, including most