Which of the following is NOT a nonpoint source of pollution? 

A)  pesticides dispersed by airplane and wind onto a crop 
B)  runoff from a stockyard 
C)  a smokestack from a power plant 
D)  fertilizer runoff from lawns

Nonpoint Source

Pollution that cannot be traced back to a single source or location, often resulting from runoff that collects pollutants from widespread areas.

Pesticides

Chemical agents used to kill or control pests that damage crops and spread diseases, including insecticides, herbicides, and fungicides.

Fertilizer Runoff

The movement of water-soluble components of fertilizer from agricultural lands to nearby water bodies, potentially causing nutrient pollution and algal blooms.