These events leave Earth ripe for evolutionary changes as new species develop to take the places of those lost. Which scenario describes an example of extinction. How To Stop The Sixth Mass Extinction Cnn Accounts for most extinctions of species steady gradual loss of species. . Of the many mysterious and unexplained events that have happened on Earth over millions of years mass extinctions are perhaps the most perplexing. Identify the statement that best defines systematics. Oceanatmosphere chemistry Climate change Volcanic activity. Mass extinctions involve the monumental loss of plant and animal species over short time. The phenomenon of spontaneous. Check all that apply. O A rainforest in Brazil is cleared to harvest timber and many species of plants insects and animals lose their habitat and as a result they die. Select the scenario that describes a mass extinction O A rainforest in Brazil is cleared