Which of the following indicates potential termite infestation?

Wooden porch steps in soil contact is a significant indicator of potential termite infestation because termites thrive in moist environments and often enter structures through wood that is in direct contact with the ground. When wooden structures are in contact with soil, they can easily become a target for termites, which feed on cellulose found in wood. The moisture from the soil can also promote wood decay and make it more attractive to termites.

In contrast, gaps under doors and dry rot in lumber, while they may indicate other issues related to property maintenance or structural integrity, do not specifically signal a high risk for termite activity. Healthy grass growth is unrelated to termite infestation and typically indicates a well-maintained lawn rather than a concern for wood-destroying organisms.