The correct options are
A Planning agricultural activities
C Watering plants and trees
Farmers wait for rain to grow their crop with enough water and plan related agricultural ativities.
Also, rain naturally provides water to plants and trees and is the most important factor in sustainance of forests.
Wireless communication signals face a significant disturbance during rains and disrupts the quality of its service.
Heavy rains may cause floods and hence, may cause natural disasters.