Witch of these is an example of an environment changing slowly

It is important to note that whenever the physical environment is changed animals and plants have to adapt or they will go extinct. Overtime environments change in some instances is due to the slow movement of the continents which can take millions of years, Earth's climate also causes changes in the environment over a long period of time. Additionally, some changes can also be caused by people since people can change forests into farms or intro concrete streets as such.