Liquids that have a specific gravity of less than 1 will typically:

Liquids with a specific gravity of less than 1 are less dense than water, which means they will typically float on the surface if they are introduced into a body of water. Specific gravity is a measure of the density of a substance compared to the density of water. Since the density of water is approximately 1 g/cm³, substances with a specific gravity less than 1 will have a density lower than this threshold, causing them to rise to the top rather than sink.

In contrast, liquids with a specific gravity greater than 1 would sink because they are denser than water. The other options reflect characteristics that do not directly correlate with the density in this context. For instance, while some liquids may evaporate quickly, this does not relate to specific gravity and depends more on the volatility of the liquid itself. Similarly, expansion in volume is a physical property that isn’t dictated solely by density. Therefore, the correct choice accurately reflects the principle of buoyancy in relation to specific gravity in aquatic environments.