Question

The temperature of the earth’s atmosphere is gradually increasing. This is due to:
A.Global warming
B.Global housing
C.Sun
D.None of the above

Answer 1

Hint: The greenhouse gases are responsible for this. The carbon dioxide responsible for the emission has increased and this traps the heat released from the earth surface and increases the temperature of earth surface and causes a phenomenon known as global warming.

Complete step by step answer:
The population of the earth is increasing day by day and we humans are being dependent on industries more and more with each passing day. This has increased the amount of coal and oil being burnt across the globe. We need to remember the earth has an atmosphere and it helps us to sustain life. The sun lights heat the earth surface and thereby cause the land to heat. At night as the sun sets and the temperature of the earth decreases this heat tries to escape the earth surface. The greenhouse gases like carbon dioxide and methane present in trace amounts in the atmosphere absorb this heat to some extent and prevent the earth temperature to decrease beyond the freezing point. But in the recent days post industrial revolution with increase in greenhouse gases in the atmosphere due to human activities have led to an increase in absorption of this heat and thus these heats up the earth crust. Humans have relentlessly deforested trees which would act as an absorber of the gases and this caused the earth to be even more heated. This heating of the earth's atmosphere is commonly called global warming. The depletion of the ozone layer is also a catalyst to these.
The answer to this question is thus global warming.

Hence A is the correct option.

Note:
Global housing is a process in which the people from across continents establish their houses. The multistoried building is a benefactor as it reduces the number of trees cut for the process and allows re plantation. Thus the answer is global warming.