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cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle