Which statement best explains how the animals in the diagram contribute to the carbon cycle? A.
They remove carbon from the atmosphere during respiration and replace it with oxygen that is used in photosynthesis.

B.
They eat plants and other organisms that contain carbon which prevents it from ever being stored.

C.
They remove carbon from the soil during respiration and exchange it with oxygen that evaporates into the atmosphere.

D.
They eat plants and other organisms which contain carbon and deposit carbon into the soil when they die.

Like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.