In general, the greenhouse effect is a good thing. without greenhouse gases, the temperature on earth would be too cold to support life. with too many, it would heat up beyond survivable levels. earth is sometimes called the goldilocks planet because it is "just right."a. trueb. false

a. True

Explanation:

The planet earth is able to support life as it lies in the habitable zone that is also called as the Goldilocks zone and this zone supports the life-forming elements of the planet and thus the planet is habitable as compared to the other large and massive and gaseous giants. Earth was a made to support the formation of the water bodies as the large degassing and cooling of the earth by the removal of the hydrogen gases by the suns solar storms and the habitable zone is thus optimum for the germination of bacteria as it is neither too cold or too hot for the planet.

Answer collision and mountain formation;