The answer would be the first option or oxygen energy system.
A portion of the food is used by the plant itself in cellular respiration and the rest is consumed by animals or by decomposers.
Ph value between 0.5 and 2.5 is the optimum temperature of the pepsin which means its the most active. When temperature increase above the optimum temperature it will cause a rapid decrease in the rate of reaction. High temperature breaks the bond that keeps the enzyme (pepsin) in shape. The enzyme will denature and become inactive.
Glomar Challenger missions started in 1968. The drilling ship collected cores, or long cylinders of sediment and rock beneath the seabed. The cores confirmed the theory of seafloor spreading and tectonic plates. Collected data also showed evidence of change in the earth's climate throughout history, as well as evolutionary clues.
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