What type of pest control relies on environmental factors like sunlight?

The correct choice relates to pest management practices that modify environmental conditions to reduce pest populations. Cultural control involves practices that enhance plant health to make them more resistant to pests and diseases. This can include the consideration of environmental factors such as sunlight, which plays a significant role in plant growth and pest behavior.

For instance, providing adequate sunlight to plants can help them grow stronger and healthier, reducing their susceptibility to pest infestations. Moreover, adjusting planting times and spacing based on sunlight exposure can also limit pest proliferation by creating less favorable conditions for pests to thrive.

The other options represent different pest control methods that do not primarily depend on environmental factors like sunlight. Chemical control focuses on using pesticides to manage pests, while biological control involves the use of natural predators or parasites to suppress pest populations. Physical control employs physical barriers or methods to prevent pest access or eliminate them. Each of these methods serves a specific function, but they do not inherently rely on environmental factors like cultural practices do.