The answer would be C, as many streams/rivers carry plant seeds, dispersing them. If there was a drought, these seeds wouldn't be able to float on the stream and disperse.
I don't think it can because isn't it like cooler under ground than above ground. also if this was true wouldn't we burn alive?
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no, the number piramid is from greatest at the bottom to the smallest at the top
The answer to this question would be C.