Observe the diagram and answer the question given below:

Which of the following is a part of detritus food chain?

Earthworm

The correct answer is Option (1)- Earthworm

The detritus food chain (DFC) begins with dead organic matter. It is made up of decomposers which are heterotrophic organisms, mainly fungi and bacteria. They meet their energy and nutrient requirements by degrading dead organic matter or detritus. These are also known as saprotrophs. Decomposers secrete digestive enzymes that breakdown dead and waste materials into simple, inorganic materials, which are subsequently absorbed by them.

Earthworms are indeed a part of detritus food chains. Detritus food chains, also known as decomposer food chains, involve the breakdown of dead organic matter (such as fallen leaves, plant debris, and dead animals) by decomposers like earthworms, fungi, bacteria, and other detritivores.

Earthworms play a vital role in the decomposition of organic matter within the soil. They feed on decaying plant material and microorganisms present in the soil, helping to break down complex organic compounds into simpler substances. In the process, they facilitate the recycling of nutrients and contribute to soil enrichment.

So, earthworms are considered important members of detritus food chains as they are responsible for the decomposition and recycling of organic matter in terrestrial ecosystems.