Which of the Following Provides a Chemical Barrier to Infectious

question 38

Multiple Choice

Which of the following provides a chemical barrier to infectious disease?

• A)the skin
• B)the nostrils
• C)hair
• D)tears

---

Definitions:

Lawn-Care Industry

A sector of the economy that provides maintenance services for lawns, including mowing, fertilization, pest control, and landscaping.

Welfare Loss

A decrease in economic efficiency, often measured as a lost benefit or surplus to consumers and producers, usually due to market failure or government intervention.

Natural Monopoly

A market structure where a single company can supply a product or service more efficiently than any potential competitor due to factors like economies of scale.

Government-Owned

Assets, businesses, or entities that are owned and operated by a government rather than by private individuals or companies.