Coral reefs have a symbiotic relationship with algae. because of human activity, the ocean is absorbing high levels of , which causes an increase in ocean temperature. due to these unfavorable conditions, corals expel algae, leading to .

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.