Civil engineering is a branch of engineering that deals with the design, construction, and maintenance of infrastructure and built environments. It encompasses a wide range of activities including the design and construction of buildings, bridges, roads, airports, dams, water supply systems, sewage systems, and other structures that facilitate human activities. Civil engineers use principles of mathematics, physics, and materials science to plan, design, and oversee construction projects while considering factors such as safety, sustainability, and economic feasibility. They play a crucial role in shaping the physical environment and improving the quality of life for communities around the world.