Genetic engineering's agricultural benefits

Steps:

• Define genetic engineering as modifying organisms' DNA for desired traits.
• Identify advantages like improved crop resistance to pests or diseases.
• Evaluate choices for positive outcomes versus risks.
• Select the option that directly reduces chemical use in farming.

Why B is correct:

• Genetic engineering produces pest-resistant crops, like Bt corn, which express toxins to deter insects, thereby decreasing reliance on chemical insecticides per agricultural biotechnology principles.

Why the others are wrong:

• A: Gene spreading represents unintended ecological risks, not an advantage.
• C: Biodiversity reduction is a potential harm from monocultures, not a benefit.
• D: Unexpected side effects highlight uncertainties and drawbacks, not positives.

Final answer: B