Minerals,metals,and fossil fuels are which type of energy resources?

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

Identify the odd one out regarding the process of bio-magnification.

Which of the following organisms is likely to have the highest concentration of $D.D.T.$ in its body?

Domestic waste will result in ..........

Consider the following statements about eutrophication:
$I.$ Eutrophication is the natural ageing of a water body by nutrient enrichment.
$II.$ The accelerated ageing of lakes due to sewage and agricultural and industrial wastes is called cultural or accelerated eutrophication.
$III.$ The plant nutrients responsible for eutrophication are nitrates and phosphates.
$IV.$ Phosphates and nitrates accelerate the growth of algae which utilize oxygen and may deoxygenate the water enough to kill the fish and other aquatic animals.
Which of the statements given above are correct?