Which of the following cracks can be a potential entry point for insects?

Cracks behind baseboards serve as significant entry points for insects because they often lead to hidden spaces that provide shelter and access to the interior of a building. These gaps can allow pests to infiltrate areas where they might find food, moisture, and suitable nesting sites. Unlike other areas, such as the ceilings, corners of rooms, or outside walls, cracks behind baseboards are frequently overlooked during inspections and can go unnoticed until an infestation occurs. This makes them particularly problematic, as they can facilitate the movement of pests from the exterior to the interior environment without being detected easily. Understanding this can aid in more effective pest management practices, including sealing potential entry points and reducing the likelihood of infestations.