$A$ man-made ecosystem is:

Which of the following can be identified as secondary consumers?

Match the columns:

Column-$I$	Column-$II$
$(a)$ Decomposers	$(i)$ Bacteria
$(b)$ Primary productivity	$(ii)$ Consumers
$(c)$ Natural ecosystem	$(iii)$ Producers
$(d)$ Secondary productivity	$(iv)$ Forest

$A$: Neither the community modifies the environment nor the environment forces the community to leave the place in the climax stage of succession.
$R$: Climax community is xerophytic in most of the types of succession.

Arrange the stages of hydrarch succession in the correct sequence.

Choose the incorrect sentence from the following.