Humus is important for plant growth because

• (a) It is partially decomposed
• (b) It is derived from leaves
• (c) It is rich in nutrients and increases the water holding capacity of the soil.
• (d) It is made up of dead organic matter
• (e) All of the above

Humus plays a crucial role in promoting healthy plant growth for several reasons. It is a dark, organic material formed from the decomposition of plant and animal matter. Here’s why it’s so beneficial:

Key Benefits of Humus

• Rich in Nutrients: Humus contains essential nutrients that plants need to thrive, such as nitrogen, phosphorus, and potassium.
• Water Retention: It improves the soil's ability to retain moisture, which is vital for plant survival, especially in dry conditions.
• Soil Structure: Humus enhances soil structure, making it more aerated and easier for roots to grow.
• Microbial Activity: It supports beneficial microorganisms that contribute to soil health and nutrient availability.

Considering all these factors, the correct answer is (e) All of the above. Each aspect mentioned contributes to the overall importance of humus in supporting plant growth.