Pathogen is defined as

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Multiple Choice

Pathogen is defined as

Explanation:
Pathogen refers to a disease-causing agent. It’s any organism or biological entity that can invade a host and disrupt its normal functions, leading to illness. This includes bacteria, viruses, fungi, and protozoa, and even some prions. The other descriptions don’t capture this disease-causing aspect: an insect that preys on pests is a beneficial predator, not a disease-causing agent; an organism that reduces humidity isn’t about illness; and while a parasite lives on or in a host, the defining idea of a pathogen is that it causes disease.

Pathogen refers to a disease-causing agent. It’s any organism or biological entity that can invade a host and disrupt its normal functions, leading to illness. This includes bacteria, viruses, fungi, and protozoa, and even some prions. The other descriptions don’t capture this disease-causing aspect: an insect that preys on pests is a beneficial predator, not a disease-causing agent; an organism that reduces humidity isn’t about illness; and while a parasite lives on or in a host, the defining idea of a pathogen is that it causes disease.

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