An example of a vector is:

An example of a vector is:

• A. Mosquito
• B. Bacteria
• C. Virus
• D. Fungus

Answer: (A)

A vector is an organism that passes pathogens from one host to another, enabling disease spread without being the disease-causing agent itself. A mosquito fits this role because it can acquire pathogens like malaria parasites or dengue virus from an infected person or animal and transmit them to others during blood feeding. Bacteria, viruses, and fungi are infectious agents themselves; they can cause disease, but they are not the means by which pathogens are transmitted between hosts. So the mosquito is the example of a vector.

A vector is an organism that passes pathogens from one host to another, enabling disease spread without being the disease-causing agent itself. A mosquito fits this role because it can acquire pathogens like malaria parasites or dengue virus from an infected person or animal and transmit them to others during blood feeding. Bacteria, viruses, and fungi are infectious agents themselves; they can cause disease, but they are not the means by which pathogens are transmitted between hosts. So the mosquito is the example of a vector.