What does physical modification refer to in pest control?

Physical modification in pest control refers to altering environmental conditions to make them less conducive for pests to thrive. This involves adjusting factors such as light, humidity, temperature, and other environmental conditions that may impact pest behavior and survival. By modifying these physical conditions, pests can be discouraged from establishing themselves, reproducing, and causing damage.

For instance, reducing humidity in a storage area can help prevent the growth of mold and the attraction of pests that thrive in damp environments. Similarly, controlling temperature can impact the life cycle of pests, making conditions less favorable for their development. This proactive approach serves as a preventative measure, targeting the pest's habitat rather than solely focusing on their elimination.

Other options provided in the question focus on alternative methods of pest control, such as introducing natural enemies or chemical interventions, which do not fall under the definition of physical modification. The emphasis here is on creating a less hospitable environment through direct modification of physical factors.