please give me answer$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_-$What are the foundational theories in civil engineering, and how do they underpin the discipline's core principles and practices? Explore key theories such as structural mechanics, fluid mechanics, geotechnical engineering, and construction materials science. Discuss their roles in designing and analyzing structures, managing infrastructure projects, and ensuring safety and sustainability in civil engineering endeavors. Consider how these theories have evolved over time, incorporating advancements in technology and materials, and their implications for modern civil engineering practices. Additionally, examine interdisciplinary aspects, such as environmental impact assessment and urban planning, and how they intersect with theoretical frameworks in civil engineering.