Question

question 10 select the example of a natural source of air pollution. the cement factory in town has been operating continuously for 25 years. a volcano erupts and spews smoke and ash. a jet flies from denver to minneapolis. a truck emits diesel exhaust.

Explanation:

Natural sources of air - pollution occur without human - made industrial or transportation activities. A volcano eruption is a natural event that releases smoke and ash into the air, contributing to air pollution. The other options involve human - made activities like factory operation, jet flight, and truck exhaust.

Answer:

B. A volcano erupts and spews smoke and ash.