Out of the given options, ‘Without greenhouse gases, Earth would be too cold for life to exist’ explains why greenhouse gases are needed for the survival of life on Earth.
Answer: Option B
Explanation:
Greenhouse gases which includes carbon-dioxide, nitrous oxide, vapours, ozone and methane forms a layer around the earth that prevents the escape of heat energy from earth’s atmosphere. This phenomenon is called Greenhouse effect.
Without the layer of these gases around the planet, everything will be covered with ice on the surface and it would be too cold for the sustenance of any life form on the earth. Our planet needs a perfect balance of these gases as any excess or too little gases will be deterrent to the life form on earth.
