Which statement explains why greenhouse gases are needed for the survival of life on earth?

The statement that best explains why greenhouse gases are needed for the survival of life on earth is : without greenhouse gases, earth would be too cold for life to exist
Greenhouse gases (on moderate amount) will promote plant growth that will support the living organisms on earth

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The greenhouse effect is important, because it contributes to the survival of life on Earth. Without the greenhouse effect, the temperature of the planet would be similar to conditions experienced on the moon. On the lunar surface, with no atmosphere to mediate temperature .

A) early horses is your answer

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.