The importance of an ecosystem lies in

Which group of living organisms given below is a link in the food chain between green plants and a hawk?

In a food chain, which of the following is produced in the largest amount?

Match the trophic levels with their correct species examples in a grassland ecosystem.

$(a)$ Fourth trophic level	$(i)$ Crow
$(b)$ Second trophic level	$(ii)$ Vulture
$(c)$ First trophic level	$(iii)$ Rabbit
$(d)$ Third trophic level	$(iv)$ Grass

Select the correct option:

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

How many of the following are primary producers in a terrestrial ecosystem?
Herbaceous plants,Algae,Woody plants,Phytoplankton,Aquatic plants