Biology

The correct answer is: B.Smoke.

While smoke can contribute to air pollution, it does not directly cause water pollution. Smoke primarily contains pollutants like carbon monoxide, particulate matter, and chemicals that affect air quality, not water bodies.

Here’s how the other options contribute to water pollution:

A.Oil spills: When oil is released into oceans, rivers, or lakes, it creates a layer on the water's surface, harming aquatic life and ecosystems.