A gradual increase in air temperatures near Earth's surface. o The possible consequences of global warming are uncertain but may be severe. They include
melting of polar ice caps, rising sea levels, drought, and an increase in the
frequency and severity of storms. *
Global Warming
O Greenhouse Effect
O Greenhouse Gas
Heat flow

This question is incomplete and unclear as the question is not clearly expressed. However, the terms in the option will be explained for better understanding. Please find the explanation below.

Explanation:

Global warming is a phenomenon whereby the temperature of the Earth's surface undergoes a gradual increase. Global warming is caused by the actions of certain gases that possess the ability to trap and emit heat called GREENHOUSE GASES e.g carbon dioxide, methane etc.

The combined effect of greenhouse gases that leads to global warming is referred to as GREENHOUSE EFFECT. Some of the effects of global warming are as follows: melting of polar ice caps, rising sea levels, drought, and an increase in the frequency and severity of storms.