Zooplanktons are included in which trophic level?

An ecosystem is a complex interacting system of

The second trophic level in a lake is . . . . . . .

Given below is a figure of an ecosystem. Answer the following questions.
$(i)$ What type of ecosystem is shown in the figure?
$(ii)$ Name any plant that is characteristic of such an ecosystem.

Biotic and abiotic components together form a .......

What percentage of the total global carbon is contained in the atmosphere (in $, \%$)?