Directions: Read the following paragraph and answer the questions below.

Human Diseases, a vast and complex field within medical science, focuses on the study of conditions that negatively affect the health of individuals. Diseases can be caused by a variety of factors, including genetic predisposition, environmental influences, lifestyle choices, and pathogens such as bacteria, viruses, and fungi. They are usually classified into categories such as infectious, genetic, environmental, and lifestyle-related diseases. Infectious diseases are caused by pathogens and can often be spread from person to person. Genetic diseases are inherited from parents and are caused by abnormalities in the genetic code. Environmental diseases are influenced by factors such as pollution, radiation, and chemical exposure. Lifestyle-related diseases are often the result of poor dietary habits, lack of physical activity, and other personal choices. Understanding the causes, classification, and management of human diseases is crucial in medical science and healthcare.