task $99===$"What theoretical frameworks underpin civil engineering practices, and how do they influence decision$-$making in construction projects? Explore principles of structural analysis, materials science, and fluid mechanics as foundational theories. Discuss how concepts like equilibrium, stress analysis, and material properties inform design choices. Consider theoretical models such as finite element analysis for predicting structural behavior and optimizing designs. Delve into theories of soil mechanics for foundation design and geotechnical engineering. Examine how theoretical understanding of environmental factors like seismic activity and climate impacts engineering solutions. Investigate how these theories are applied in practical scenarios to ensure safety, sustainability, and efficiency in civil engineering projects."