Which of the following is a chemical control example?

• A. Hoeing and weed pulling
• B. Atrazine
• C. Beauveria bassiana
• D. Round Up

Answer: (D)

Chemical control uses a pesticide product—a chemical substance—to kill or suppress pests or weeds. Round Up is a herbicide containing glyphosate, a chemical that kills plants by disrupting a key plant enzyme and then moving through the plant. That direct use of a chemical to control vegetation is what makes it a clear example of chemical control.

The other options illustrate different approaches: hoeing and weed pulling rely on physical disturbance (mechanical control), Beauveria bassiana is a biological control agent (a living organism used to manage pests), and Atrazine is also a chemical herbicide, but the item chosen here emphasizes Round Up as the straightforward, widely recognized chemical control example.