Answer: pesticides, fertilizers and chemical spills
Explanation:
A watershed can be define as a land where all the surface water drains off. The water in the watershed comes from river streams, oceanic drainage, precipitation like snow or rain. The watershed are subjected to pollution. The pollutants come from industrial wastes, erosion, agricultural runoff, untreated sewers.
On the basis of the above description, pesticides, fertilizers and chemical spills are the correct options.
