Which type of mulch is known to contribute nutrients to plant growth?

Organic mulch is known for its ability to contribute nutrients to plant growth because it is made from natural materials such as wood chips, leaves, straw, or compost. As organic mulch decomposes, it releases valuable nutrients back into the soil, enhancing soil fertility and promoting healthy plant growth. Additionally, organic mulch helps improve soil structure, moisture retention, and even suppress weed growth, creating a more favorable environment for plants.

In contrast, plastic mulch creates a barrier that prevents moisture loss and weed growth but does not provide any nutrients to the soil as it does not break down. Inorganic mulch, such as gravel or stones, also serves primarily as a physical barrier rather than a source of nutrients. Rubber mulch, made from recycled tires, is another non-biodegradable option that does not contribute organic matter or nutrients to the soil. Hence, among the choices provided, organic mulch stands out as the only type that actively enriches the growing environment through nutrient contributions.