$A$ bear that eats a fish that further ate bugs that ate algae is a

Identify the correct sequence of development of a stable community (climax community) starting from a new area (primary succession).

If a lake is polluted by $DDT$,its highest concentration will be found in:

How many sentences are correct?
$(1)$ The trophic levels in $GFC$ are unlimited.
$(2)$ Organisms at each trophic level depend on those at the higher trophic level for their energy demands.
$(3)$ Plants capture only $2-10$ percent of $PAR$.
$(4)$ All organisms are dependent for their food on producers, either directly or indirectly.

If carbon dioxide is withdrawn from the biosphere,which organism would first experience negative effects?

Succession proceeds from