Which term means to come in contact?

• A. External
• B. Exposure
• C. Etiology
• D. Expansion

Answer: (B)

Exposure is the term that captures coming into contact with a substance or agent. In health and medical contexts, it describes being in contact with a disease agent, chemical, or environmental factor, which is the trigger for potential effects or illness. The other terms describe different ideas: external means outside or outward, etiology is about the cause of a disease, and expansion refers to increasing size or extent. So exposure best fits the idea of coming into contact.