Which of the following is responsible for the heating of the Earth's surface and atmosphere?

Identify the correct pair of various greenhouse gases and their contribution to global warming.

The climate of the world is threatened by

The greenhouse effect is the cumulative result of the influences of certain gases. Identify the gas which is not involved in this influence.

$CO_2, CH_4, CFCs$,and $N_2O$ are called greenhouse gases because $.........$

The given diagram represents the greenhouse effect.
$I.$ Greenhouse gases absorb infrared radiation from the earth. The absorbed radiations are again emitted towards the earth's surface,heating it up.
$II.$ $CO_{2}, CH_{4}, CFCs$ and $N_{2}O$ are the gases responsible for the greenhouse effect.
$III.$ An increase in the level of greenhouse gases results in considerable heating of the earth,leading to global warming.
Which of the statements given above are correct?