give me correct answer$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$Civil engineering theory encompasses principles of structural analysis, material mechanics, and fluid dynamics. It provides the framework for designing and constructing infrastructure, including bridges, roads, and buildings, with a focus on safety, durability, and sustainability. Theoretical concepts such as equilibrium, stress, and strain underpin structural design, while fluid mechanics governs the behavior of water and air in hydraulic systems. Understanding these theories is essential for engineers to ensure the stability and functionality of civil works, contributing to the advancement and resilience of societies worldwide.