Which statement is true about the properties of liquids?

The statement that liquids conform to the shape of their container but have a definite volume is accurate. Liquids have a fixed volume due to the close proximity of their molecules, which allows them to occupy a specific amount of space. However, they do not have a definite shape; instead, they take the shape of the container they are in. This ability to flow and adapt to various container shapes is one of the fundamental characteristics that differentiates liquids from solids and gases.

The other options do not accurately reflect the properties of liquids, as solids have a definite shape and volume, while gases have neither definite shape nor volume. The notion that liquids cannot flow is incorrect, as liquids naturally possess the ability to flow and move, adapting to the shape of their environment. Lastly, the statement regarding liquids having no defined boundaries misrepresents their physical properties, as liquids do occupy a defined volume, albeit without a fixed shape.