Questions: A is a disease-causing agent. (A) nutrient (B) habitat (C) pathogen (D) host

A is a disease-causing agent. (A) nutrient (B) habitat (C) pathogen (D) host
Transcript text: A $\qquad$ is a disease-causing agent. (A) nutrient (B) habitat (C) pathogen (D) host
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Solution

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The answer is the third one (C): pathogen.

Explanation for each option:

  • (A) Nutrient: This is incorrect. A nutrient is a substance that provides nourishment essential for growth and the maintenance of life, not a disease-causing agent.
  • (B) Habitat: This is incorrect. A habitat is the natural environment in which an organism lives, not a disease-causing agent.
  • (C) Pathogen: This is correct. A pathogen is a microorganism that causes disease in its host, such as bacteria, viruses, fungi, or parasites.
  • (D) Host: This is incorrect. A host is an organism that harbors a pathogen, providing it with nutrients and a place to live, but it is not the disease-causing agent itself.

In summary, a pathogen is the correct term for a disease-causing agent.

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