Read the following passage carefully and answer the given questions.

The earthworm is referred to as the farmer's friend. This is because they help in the breakdown of complex organic matter as well as in loosening of soil. Similarly, decomposers break down complex organic matter into inorganic substances like carbon dioxide, water and nutrients and the process is called decomposition. Dead plant remains such as leaves, bark, flowers and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. Some of the steps in the process of decomposition are fragmentation, catabolism, leaching, humification etc.

Which one of the following is not associated with earthworm as 'farmer's friend"?

It reduces the quality of crops and soil

The correct answer is Option (1) → It reduces the quality of crops and soil 

Earthworms are called "farmer's friend" because they provide several benefits to the soil and agriculture:

Faecal matter adds to fertility of soil – True. Earthworm castings are rich in nutrients like nitrogen, phosphorus, and potassium.

It helps with the breakdown of complex organic matter – True .Earthworms decompose organic waste, making nutrients available to plants.

It helps to loosen soil – True. Their burrowing action aerates the soil, improves drainage, and promotes root growth.

It reduces the quality of crops and soil – This is false. Earthworms improve soil quality and crop productivity.