Earthworm ; member of phylum annelida derives nourishment from

Options

A. sugarcane roots
B. decaying fallen leaves and soil organic matter
C. soil insects
D. small pieces of fresh fallen leaves of maize

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to the earthworm, specifically the species *Ferritima posthuma*, which belongs to the phylum Annelida.

2. **Understand the Feeding Habit**: Earthworms are known to be detritivores. This means they feed on detritus, which consists of decomposing organic matter.

3. **Define Detritus**: Detritus includes decaying fallen leaves, twigs, and organic matter found in the soil. It is a crucial component of the ecosystem as it contributes to nutrient cycling.

4. **Select the Correct Option**: Given the options provided in the question, the correct answer is that earthworms derive nourishment from detritus (option 2). They do not primarily feed on sugarcane roots, soil insects, or fresh fallen leaves.

5. **Explain the Role of Earthworms**: Earthworms play a vital role in enhancing soil fertility. By breaking down organic matter, they convert it into simpler components that enrich the soil, making it more fertile. This process is beneficial for agriculture, leading to the term "farmer's friends."

6. **Highlight the Use of Earthworms in Agriculture**: Earthworms are also used in vermicomposting, where they help decompose organic matter, resulting in nutrient-rich compost that can be used to improve crop yields.

**Final Answer**: Earthworms derive nourishment from detritus, which includes decaying organic matter like fallen leaves and twigs.

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