Explanation:

Both the statements are correct.
Dew is water in the form of droplets that appears on thin, exposed objects in the morning or evening due to condensation. The ideal conditions for its formation are clear sky, calm air, high relative humidity, and cold and long nights.
Fog: When the temperature of an air mass containing a large quantity of water vapour falls all of a sudden, condensation takes place within itself on fine dust particles. So, the fog is a cloud with its base at or very near to the ground.
Mist: Mist is also formed by water droplets, but with less merging or coalescing. Mists are frequent over mountains as the rising warm air up the slopes meets a cold surface.
The difference between the mist and fog is that mist contains more moisture than fog.