Which of the following identifies a type of biologic control?

The identification of parasites as a type of biologic control is correct because biologic control refers to the use of living organisms to manage pest populations. Parasites can play a significant role in controlling pest species by feeding on them or by weakening their populations through disease transmission. This method of control leverages the natural relationships in ecosystems, where one organism affects the population dynamics of another.

In contrast, traps, chemicals, and netting represent different methods of pest management that do not utilize living organisms. Traps may physically capture pests without altering their biological behavior, chemicals generally refer to synthetic or natural substances that manage pest populations through toxicity instead of biological interactions, and netting can physically exclude organisms from an area rather than utilizing their biological relationships. Thus, parasites exemplify the concept of biologic control effectively, tapping into natural ecological interactions to reduce pest populations sustainably.