Any natural or manufactured item that is applied to soil or plant tissues to offer plant nutrients is known as:

Correct option is A

Explanation:

A fertiliser is any natural or manufactured item that is applied to soil or plant tissues to provide essential plant nutrients like nitrogen, phosphorus, and potassium. Fertilisers help in improving the growth, yield, and health of plants by supplementing the nutrients that may be lacking in the soil.

1. Fertilisers can be either organic (e.g., compost, manure) or inorganic (e.g., chemical fertilisers like urea, NPK).

2. The use of fertilisers is crucial in modern agriculture to enhance soil fertility and ensure higher crop productivity.

• Harvesting is the process of gathering mature crops from the field.

• Eutrophication is the process where water bodies become enriched with nutrients, often due to excessive fertiliser runoff, leading to overgrowth of algae.