Answer :
Answer:
food chain shows the feeding relationship between different organisms in a particular environment and/or habitat. Plants are at the bottom of a food chain because they are producers that make their food from a process called photosynthesis . Organisms that can make their own food are called producers. Consumers are animals that eat the products of producers or other animals. The animal that eats the producer is called the primary consumer and it gains the most amount of energy. The animal that eats the primary consumer is called a secondary consumer which in the primary consumer's energy which is transferred becomes lower due to the primary consumer consuming some energy. The animal that eats the secondary consumer is called a tertiary consumer and so on to fourth, fifth, etc. The direction of arrows between the organisms shows who eats what and what gets eaten by what.
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In nature, we generally distinguish two general types of food chains: of razing food chain and detritus food chain. The Grazing food chain starts from the living green plants, goes to grazing herbivores (that feed on living plant materials with their predators), and on to carnivores (animal eaters).
Ecosystems with such type of food chain are directly dependent on an influx of solar radiation. This type of chain thus depends on autotrophic energy capture and the movement of this captured energy to herbivores.
Most of the ecosystems in nature follow this type of food chain. From energy standpoint, these chains are very important. The phytoplankton’s – zooplanktons – fish sequence or the grasses – rabbit- fox sequence are the examples of grazing food chain.
The Detritus Food chain goes from dead organic matter into microorganisms and then to organisms feeding on detritus (detritivores) and their predators. Such ecosystems are thus less dependent on direct solar energy. These depend chiefly on the influx of organic matter produced in another system. A good example of a detritus food chain is based on mangrove leaves.
