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The choice stating that structural materials can have disadvantages based on properties is accurate because it recognizes that different materials possess varying physical, mechanical, and chemical properties, which can affect their performance in construction. For example, while steel is known for its high tensile strength, it can be susceptible to corrosion if not properly treated. Similarly, concrete can have great compressive strength but may suffer from brittleness and cracking under certain conditions.

Understanding the properties of materials is crucial in civil engineering because these properties dictate how materials will behave under different loads and environmental conditions. This insight helps engineers select the appropriate materials for specific applications while being aware of their limitations.

Other options present characteristics that do not accurately represent structural materials. Not all materials have uniform advantages, nor are they all lightweight, as materials like concrete and steel can be quite heavy. Additionally, stating that structural materials have no limitations is misleading, as every material has its strengths and weaknesses that must be considered in design and construction.