Answer:
1. These include, heart disease, malignant neoplasms, chronic lower respiratory disease, cerebrovascular disease, congenital abnormalities, unintentional injury, Alzheimer disease, diabetes mellitus, nephritis, influenza and pneumonia, and suicide
2. The problem of blocked drains occurs when foreign materials such as soap, hair, food, and fats build up between the drain-pipe and other pipes that flow at the bottom. In the beginning, the materials are in a small amount. With time, as the amount of objects increases, it stops water to flow freely.
4.ang presyo ng kaunlaran at pag-unlad
