Answer :

suku008
energy is lost to the surrounding as food chain goes from one to the next level.so there are only less organisms at each level in a food chain.
therefore if the food chain goes beyond four or five there will be no animals left to eat
eg: grass>>>>>.rabbit>>>>>fox>>>>>>lion then ??????????????????????
hope I helped u...............
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shivam2000
Most food chains consists of four steps as animals have different energy requirements. As food chain increases the energy also get reduced and at last the food can be eaten by the animals which have less energy.

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