What does the dew point indicate?

The dew point is defined as the temperature at which air becomes saturated with moisture and can no longer hold all of its water vapor. When air reaches this temperature, the moisture in the air begins to condense into liquid water, leading to the formation of dew. Understanding the dew point is essential in meteorology and aviation, as it gives insight into humidity levels and potential weather conditions.

While the other options present different weather-related concepts, they do not accurately define the dew point. The temperature where clouds are formed involves more complex atmospheric processes and isn’t solely dependent on the dew point. Similarly, the maximum humidity level is a related concept but does not equate to the specific temperature that corresponds to saturation. The point at which air starts to cool does not directly relate to moisture content or saturation. Therefore, option A effectively captures the essence of what dew point signifies in relation to atmospheric moisture.