Answer :
Final answer:
Contagious refers to diseases that spread from person to person. They are caused by pathogens and can spread through direct contact, indirect contact, or vector transmission. Option B
Explanation:
Diseases that can be spread from one person to another are said to be communicable, also known as contagious. These types of diseases, which include measles and gonorrhea, are caused by pathogens, such as bacteria, parasites, fungi, or viruses.
Infectious diseases can be transmitted through various methods, including direct contact (like touching or coughing), indirect contact (like exposure to a shared environment or surface), or vector transmission (where a pathogen is carried by animals or insects).
However, not all infectious diseases are communicable. For instance, tetanus, caused by spore-forming bacteria, cannot be directly transferred from an infected person to another person.
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