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two species of mussels relying on the same species of phytoplankton as a food source-/- interactionalgae obtaining nutrients from symbiotic coral, and coral obtaining sugars from algal photosynthesis / interactiona tick sucking a dog's blooda rabbit eating the leaves of a dandelion planta cheetah capturing and consuming a gazelle /- interaction
competition
predation/parasitism/herbivory
mutualism

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;

answer ( groundwater);