- A Bacillus thuringiensis
- B Trichoderma
- C Pseudomonas
- D Azotobacter
Correct answer: B. Trichoderma
Explanation: Trichoderma species are free-living fungi that act as biocontrol agents against plant pathogens by competing for nutrients and space and producing antifungal metabolites.
Concept context
Microorganisms in food, medicine, sewage treatment, biocontrol, and biofertilizers