What are some examples of excessive cellulose debris?

Excessive cellulose debris primarily refers to organic matter that serves as a food source for termites and other pests. In this context, tree stumps embedded in footing are a prime example because they are made of cellulose, which is a major component of wood. Termites thrive on cellulose, so the presence of tree stumps creates a conducive environment for termite infestations, as they can easily access this food source.

The other options do not provide the same risk factors for termite activity. Loose soil might be related to moisture and drainage issues but does not provide a cellulose source for pests. Concrete blocks and metal scraps do not contain cellulose and therefore are not conducive to attracting or supporting termite populations. This demonstrates why tree stumps are highlighted as a significant concern for termite control and prevention.