Direction: In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.

Almost everyone in the present world is familiar with the term ‘Global Warming’. It (1)______ to the gradual rise in the overall temperature of the atmosphere (2)______ the planet Earth. It is true that there are (3)______ activities taking place which have been increasing the temperature (4)______.