What does the term "wood-decaying fungus" refer to?

The term "wood-decaying fungus" specifically refers to fungi that have the ability to break down wood. These fungi are vital in the ecosystem as they play an essential role in the decomposition process. They metabolize the cellulose and lignin found in wood, facilitating the recycling of nutrients back into the soil, which supports plant growth. This process is particularly important in forested areas where fallen trees and decaying wood create a habitat for various organisms and enrich the soil.

The other choices describe functions of different types of fungi. Some fungi do enrich soil or promote plant growth by aiding in nutrient absorption or forming symbiotic relationships with plants. However, these functions are not what defines wood-decaying fungi, which are specialized in decomposing wood material specifically. Likewise, fungi that feed on leaves are a different group that does not relate to the characteristics of wood-decaying fungi. Understanding the specific role of wood-decaying fungi is crucial in pest management and forestry, particularly in the context of handling and preventing termite damage.