Hiya!
You can use the example of dogs and humans, Dogs give protection and companionship while humans give a home and food to the dog!
This is called Mutualism by the way! :D
Good-Luck!!
Answer:earthquake, Tsunami
Explanation:
When the techtanic plates collide they send a few movent waves though the ground making a earthquake a earthquake can cause a tsunami if the moment of the plates are under the water
Take your shirt off, wave it round ya head like a helicopter
