Question

1. give two reasons that earthworms are important for soil.

Explanation:

1. Earthworms aerate the soil as they burrow, allowing air and water to penetrate better, which is vital for root respiration and water absorption by plants.
2. Their castings (excretions) are rich in nutrients like nitrogen, phosphorus, and potassium, and their decomposition of organic matter in the soil increases soil fertility, improving soil structure and nutrient availability for plants.

Answer:

1. Earthworms burrow, aerating the soil to improve air and water penetration for plant roots.
2. Earthworms decompose organic matter and produce nutrient - rich castings, enhancing soil fertility and structure.