The main cause for abundant coliform bacteria in the river Ganga is

"We need to manage our resources." List two reasons to justify this statement.

Which of the following is the correct match between List-$I$ and List-$II$?

List-$I$	List-$II$
$1$. Python	$a$. Tapti River
$2$. Hangul	$b$. Sabarmati River
$3$. Monal	$c$. Endangered Mammal
$4$. Dharoi Dam	$d$. Endangered Reptile
	$e$. Endangered Bird

Write one negative effect of an affluent lifestyle of a few persons on the environment.

In the context of the conservation of natural resources,explain the terms reduce,recycle,and reuse. From among the materials that we use in daily life,identify two materials for each category.

Given below are a few statements related to biodiversity. Pick those that correctly describe the concept of biodiversity.
$(i)$ Biodiversity refers to the different species of flora and fauna present in an area.
$(ii)$ Biodiversity refers to only the flora of a given area.
$(iii)$ Biodiversity is greater in a forest.
$(iv)$ Biodiversity refers to the total number of individuals of a particular species living in an area.