Which of the following is a biological control example?

• A. Predators
• B. Atrazine
• C. Glyphosate
• D. Cyfluthrin

Answer: (A)

Biological control uses living organisms to reduce pest populations by acting as natural enemies. Predators are a classic example because they actively consume pest species, lowering pest numbers without introducing chemicals. For instance, lady beetles feast on aphids, helping manage aphid outbreaks in crops, and other natural predators like lacewings or spiders contribute similarly.

In contrast, the other options are chemical controls. Atrazine and Glyphosate are herbicides that kill or suppress weeds, not insects, and Cyfluthrin is a chemical insecticide that harms insects through toxicity rather than through a living enemy.