Entry holes into buildings and crevices should be blocked, or screened; use ______.

• A. Blocked
• B. Screened
• C. Netting
• D. Sealed

Answer: (C)

The idea is to create a barrier that blocks pest or bird entry while keeping ventilation intact. Netting fits best because it provides a durable, flexible mesh that can cover irregular openings and crevices on walls, roofs, vents, and other gaps. It acts as a physical barrier strong enough to deter birds and larger pests, yet the mesh size allows air and light to pass, preventing moisture buildup and poor ventilation. Netting is also practical to install, inspect, and maintain, and it holds up well to weather when properly rated.

Blocking with solid material or sealing everything can trap moisture or create maintenance challenges in irregular openings, and screening alone may not cover larger gaps or withstand heavier intrusion. Netting offers the right balance of exclusion, airflow, and practicality.