What is a key feature of Wood Decay Fungus's activity towards wood?

Wood Decay Fungus primarily contributes to the deterioration of wood by breaking down its structural integrity through the process of decay. This organism thrives in conditions where wood is exposed to moisture and can efficiently decompose lignin and cellulose, which are essential components of wood. As it metabolizes these materials, the wood undergoes a significant loss of strength and stability, leading to the phenomenon commonly referred to as rotting.

The activity of the fungus does not enhance the wood or lead to any beneficial modifications such as hardening or reinforcing its strength. Instead, its presence indicates that the wood is compromised, which can lead to structural challenges in buildings or wooden structures. Therefore, the assertion that it rots the wood accurately reflects the detrimental impact of Wood Decay Fungus on wood materials, making it the correct answer.