How does a large body of water, such as an ocean, influence climate

Large body of water like ocean, seas and large lakes affect rainfall and temperatures.
Water heats and cools more slowly than land. This means that it takes more energy to warm and cool the temperature of water. As a result, cities close to water don't have big variations in the temperature and tend to have a narrower range of temperatures throughout the year.
Coastal cities also have a lot of rainfall.

I’m confused ///: : : :

Answer volcanic outgassing;