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Biological control agents utilize natural methods such as predation, parasitism, and other strategies to manage pests. These agents are effective against pests like insects, nematodes, and certain plants, along with their natural adversaries. An effective biocontrol agent must target specific species without affecting non-target organisms.

1. Biological control agents rely on natural methods like predation and parasitism.
2. They are used to manage pests affecting plants.
3. An effective biocontrol agent must be selective for specific species.
4. All of the above are true.

Correct answer: All of the above are true.

Solution

All the given statements are correct. Biocontrol agents are natural enemies that help control pests, and an ideal biocontrol agent is species-specific to avoid harming non-target organisms.

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