Agricultural runoff is the leading cause of water pollution. Option A
Water from irrigation systems or rainfall can carry pollutants like fertilizers, pesticides, and silt into agricultural areas. Water pollution can result from these pollutants finding their way into rivers, lakes, and other bodies of water.
A major cause of nonpoint source pollution that impacts ecosystems and water quality is agricultural runoff. Because agrochemicals are widely used in farming practices, agricultural runoff is frequently regarded as the primary source of water pollution, although other potential sources include industrial discharges, urban sewage, and marine dumping.
Missing parts;
Which of the following sources is the leading cause of water pollution?
A) Agricultural runoff
B) Industrial discharges
C) Urban sewage
D) Marine dumping