What does it mean for a substance to be "runny"?

A substance described as "runny" typically means it has a high liquid content, making it flow easily and have lower viscosity compared to more solid substances. When something is runny, you usually think of it being thin or fluid, allowing it to pour or drip easily. This characteristic is often associated with liquids that have a lower density, enabling them to move freely and take the shape of their container.

The other options describe different states or properties of matter that do not align with the concept of being runny. For example, being solid and malleable refers to materials that can change shape without breaking, but they do not flow like a liquid. Similarly, gaseous substances do not fit the definition of being runny as they spread out and do not have a well-defined structure. A thick consistency indicates a higher viscosity, which is the opposite of being runny, suggesting a substance that does not flow easily. Therefore, the best representation of what it means for a substance to be "runny" is that it has more liquid than usual.