Civil engineers ensure structural stability in buildings and bridges? Discuss foundational principles of load distribution, materials selection, and design considerations. Explain the role of factors like gravity, wind, and seismic activity in engineering resilient structures. Highlight methods for optimizing construction techniques to enhance durability and safety. Explore the significance of soil mechanics in foundation design and the integration of sustainability practices. What are the key challenges faced in maintaining infrastructure integrity amidst evolving environmental and societal demands?"