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Assertion : A network of food chains existing together in an ecosystem is known as a food web.
Reason : An animal like kite cannot be a part of a food web.
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Reason : An animal like kite cannot be a part of a food web.
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The correct answer is:
If assertion is true, but reason is false
The process of transfer of energy from producers through a series of organisms i.e. from primary consumers to secondary consumers to tertiary consumers by process of eating and being eaten constitute a food chain, eg. grassland ecosystem. Food chains can never occur independently in ecosystem but various food chains are inter-connected with each other forming an interlocked system known as food web. In grassland ecosystem food chains may be-
(i) Grass $\rightarrow$ Rabbit $\rightarrow$ Hawk/kite
(ii) Grass $\rightarrow$ Mouse $\rightarrow$ Snake $\rightarrow$ Kite/Hawk
(iii) Grass $\rightarrow$ Grasshopper $\rightarrow$ Lizard $\rightarrow$ Kite/Hawk
So, the food web will include kite.
(i) Grass $\rightarrow$ Rabbit $\rightarrow$ Hawk/kite
(ii) Grass $\rightarrow$ Mouse $\rightarrow$ Snake $\rightarrow$ Kite/Hawk
(iii) Grass $\rightarrow$ Grasshopper $\rightarrow$ Lizard $\rightarrow$ Kite/Hawk
So, the food web will include kite.
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