The number of plants is incrasing instead of decreasing. How is this possible?

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Explanation:

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Carbon dioxide increases temperatures, extending the growing season and increasing humidity. Both factors have led to some additional plant growth. However, warmer temperatures also stress plants. With a longer, warmer growing season, plants need more water to survive.

b. the carbon cycle ensures living things have a source of hydrogen

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.