Correct Answer: Earthworm

Solution : The correct option is Earthworm

The animal often referred to as the "farmer's friend" is the earthworm (earthworms belong to the class Oligochaeta). Earthworms are considered beneficial to farmers because they play a crucial role in improving soil quality and fertility. They burrow through the soil, aerating it and creating channels for water and air circulation. Additionally, as they consume organic matter like dead leaves and plant material, they break it down into nutrient-rich castings, which enhances the soil's nutrient content, making it more suitable for plant growth. This natural soil improvement process conducted by earthworms is highly advantageous for agriculture and gardening.