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

hope this helps

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 .