The correct answer is (b) virus. Polio is a highly contagious disease caused by a virus that attacks the nervous system. It can cause paralysis, and in some cases, death. There is no cure for polio, but it can be prevented with vaccination.
Bacteria are single-celled organisms that can cause a variety of diseases, including pneumonia, strep throat, and tuberculosis. Fungi are multicellular organisms that can cause diseases such as athlete’s foot, ringworm, and yeast infections. Parasites are organisms that live on or in another organism (the host) and get their food from or at the expense of the host. They can cause diseases such as malaria, toxoplasmosis, and tapeworm infections.
Polio is a very serious disease, but it is preventable with vaccination. Everyone should be vaccinated against polio, especially children. Vaccination is the best way to protect yourself and your loved ones from this disease.