Biological controls are intended to replace other control practices.

• A. Eliminate pesticides
• B. Increase crop yields
• C. Replace other control practices
• D. Control non-native pests

Answer: (C)

Biological controls are a key part of integrated pest management, using living organisms to keep pest populations in check. The idea behind the statement is substitution: when a biological control is effective, it can take over tasks that would otherwise be done by other control methods, especially chemical pesticides, thereby reducing or replacing those other practices. This is why it’s considered the best fit—the goal is to lower reliance on other controls by letting natural enemies do part of the pest suppression.

Context helps: biological control doesn’t always replace every method in every situation; it’s most useful as part of a balanced strategy that may still use other controls when needed. The other options don’t capture the primary aim of biological control—it's not about directly boosting yields, not about universally eliminating pesticides, and not solely about addressing non-native pests.