More than $70\%$ of the world's freshwater is contained in $............$.

Select the incorrect statement.

Which of the following sources of energy is non-renewable?

Choose the correct answer from the given statements:
$(i)$ Sleeplessness
$(ii)$ Increases heart beat
$(iii)$ Altered breathing pattern

Assertion: Presently,the global atmosphere is warming up.
Reason: The depletion of the stratospheric ozone layer has resulted in an increase in ultraviolet radiations reaching the earth.

The periodic change in temperature in the Pacific Ocean is known as .............