The correct option is C If the assertion is a true statement, but the 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 an ecosystem but various food chains are interconnected with each other forming an interlocked system known as food forming an interlocked system known as the food web. In grassland ecosystem, food chains may be -
(i) Grass -->Rabbit --->Hawk/Kite
(ii)Grass -- >Mouse-->snake--->kite/hawk
(iii)Grass --> Grasshopper--->Lizard--->Kite/hawk
So, the food web will include kite.