In an ecosystem, carbon and oxygen are both

The oxygen cycle and the carbon cycle are closely related as they both involve photosynthesis and cellular respiration. Carbon dioxide is taken in by producers to undergo photosynthesis, and oxygen is released as a bi-product.

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correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

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