Question

recognizing pathogens and symptoms of illness and disease
which type of pathogen causes colds and the flu?
viruses
bacteria
parasites
both viruses and bacteria

Explanation:

Colds are caused by rhinoviruses, and the flu is caused by influenza viruses. Viruses are distinct from bacteria (which cause, e.g., strep throat) and parasites (which cause, e.g., malaria).

Answer:

viruses