Answer :
Final answer:
Pathogens, also known as infectious agents or microbes, are harmful organisms like bacteria, viruses, fungi, and parasites that cause disease in their host. They invade host organisms, multiply, and cause harm. They can be spread in different ways including through air, water, contact, or vectors like mosquitoes.
Explanation:
Pathogens, or infectious agents, are microorganisms - such as bacteria, viruses, fungi, and parasites - that cause diseases in their host. They are organisms that invade the host organism and are able to multiply and produce harmful effects. Microbe is another term often used to refer to pathogens. For example, the flu is caused by the Influenza virus, which is a type of pathogen. These disease-causing agents can be spread in various ways such as through air, water, physical contact or through vectors like mosquitoes.
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