The term 'Cause of Diseases' can be summarized by the word 'GERM'. Germs are microscopic organisms that can cause diseases in humans, animals, and plants. They can be bacteria, viruses, fungi, or parasites. Germs can spread through contact with an infected person or animal, contaminated food or water, or contact with contaminated surfaces. Some germs can also be airborne. It is important to practice good hygiene and take preventative measures to reduce the risk of infection.