How do mosquito traps function to reduce populations?

Mosquito traps are specifically designed to attract and capture mosquitoes, which is how they contribute to reducing populations. These traps typically use various attractants such as carbon dioxide, heat, or specific scents to draw mosquitoes in. Once they approach the trap, different mechanisms such as sticky surfaces, nets, or suction devices ensnare them, preventing their escape. This effectively reduces the number of adult mosquitoes in the area, which can help mitigate the risks associated with mosquito-borne diseases.

While other methods, such as spraying chemicals or emitting sound waves, might be employed in pest control, they either do not specifically target mosquitoes in the same way or are not utilized in the context of traps. Scattering water is also ineffective, as it can actually create breeding grounds for mosquitoes instead of reducing their population. Thus, the focused attraction and capture system of mosquito traps is what makes option B the correct choice.