Which of the following methods can help in controlling mosquito populations?

Implementing good drainage practices is a key method in controlling mosquito populations because mosquitoes breed in stagnant water. By ensuring there is proper drainage in an area, you can significantly reduce the number of places where water can accumulate and stand, which in turn decreases the availability of breeding sites for mosquitoes. Good drainage helps to ensure that water flows away from potential breeding areas, thereby disrupting the mosquito life cycle.

On the other hand, encouraging standing water or using standing plants would create ideal conditions for mosquito breeding. Increasing shade coverage does not directly address the issue of water accumulation, although it can provide a more comfortable environment for people. Effective mosquito control strategies focus on reducing or eliminating breeding sites rather than enhancing conditions conducive to their reproduction.