Final answer:
Infectious diseases are caused by pathogens that can spread from person to person. They can be transmitted through different methods like direct contact, contaminated food, airborne transmission, and vector-borne transmission.The correct option is a)
Step-by-step explanation:
The correct option is a) Viruses, bacteria, fungi, and protozoa; through airborne transmission, direct contact, contaminated food, and vector-borne transmission.
Infectious diseases are caused by pathogens, such as viruses, bacteria, fungi, and protozoa, that can travel from one person to another. These diseases can spread through different modes of transmission, including airborne transmission, direct contact, contaminated food, and vector-borne transmission.
For example, viruses like the flu and cold can be spread through airborne transmission, where the pathogens are suspended in the air and can be inhaled by others. Bacteria, such as Salmonella, can be spread through contaminated food, where the pathogens are consumed and cause illness.
Understanding the different groups of infectious disease organisms and their modes of transmission is important in preventing and controlling the spread of diseases.