Seasons, Atmosphere, Volcanoes, Evidence of Water.
Sorry if this doesn't help.
Commensalism- A whale and barnacles
Mutualism- The Oxpecker and the Rhino, the rhino provides a place for the Oxpecker to perch, while the Oxpecker eats all the bugs and parasites off the rhino.
Parasitism- A tick on a deer, and potentially harming the deer. The tick gains while the deer loses.
The answer is C. I know that because of my previous knowledge and my class knowledge hope this helps :)<span />
Answer:
it would be at the bottom of the hill. That's where all of the energy from the descent is at its peak.