According to the $..........$ norms,the implementation of $.......$ vehicles was enforced across the country from $1^{st}$ April $2017$.

Find the incorrect statement with respect to a catalytic converter.

Thermal pollution of water bodies is due to

In a eutrophic water body,the excessive growth of $\underline {X}$ leads to the death of $\underline {Y}$.

Catalytic converters,which have expensive metals as catalysts,are fitted into automobiles for reducing emission of poisonous gases. Which of the following is $NOT$ used in them?

Observe the figure and answer the following questions.
$(i.)$ What ecological term is used to describe the $DDT$ accumulation at different trophic levels?
$(ii.)$ List any one effect of $DDT$ accumulation on birds.
$(iii.)$ Will $DDT$ accumulation lead to eutrophication?
$(iv.)$ Does it affect the $BOD$?
$(v.)$ Name a disease caused by the accumulation of any heavy metal.