What is food chain class3?

A food chain is the transfer of food energy from plants to one animal and then to another animal. Most food chains start with green plants that produce food energy from the Sun. Then one animal eats the plant and another animal eats that animal. The green plants in a food chain are called producers.

A food chain shows how every living thing obtains its food. Some animals eat plants and some animals eat other animals. For example, a simple food chain links trees with 26% shrubs, giraffes (which feed on trees with 26% shrubs) and lions (which eat giraffes). Each link in this chain is food for the next link.

A food chain always starts with plant life and ends with an animal. In a food chain, an organism eats a single item, while in a food web, an organism consumes several items. The trophic level refers to the sequential stages of a food chain, starting with producers at the bottom, followed by primary, secondary and tertiary consumers. When an organism dies, decomposers break it down, return nutrients to the soil, complete a food chain, and start a new one.

Since autotrophs are the basis of all Earth's ecosystems, most environmental ecosystems follow this type of food chain. In a food chain, there is a unique path for energy flow and in a food network, there are different paths for energy flow. Producers are the ones who start the food chain, which are plants, fruits and vegetables that produce their own energy from the sun. However, the food web is able to show the appropriate representation of energy flow, since it shows interactions between different organisms.

A food web consists of many food chains and shows the different paths in which plants and animals are connected. Decomposers are the last link in the food chain and derive their energy from animals and plants that have died. The soil then becomes rich and fertile, allowing plants to grow and produce energy for a new food chain. Plants are called producers because they can use the Sun's light energy to produce food (sugar) from carbon dioxide and water.

The food chain is a linear sequence of organisms in which nutrients and energy are transferred from one organism to another. These decomposers accelerate the decay process that releases mineral salts back into the food chain, ready for plants to absorb them again and start a new food chain.