Coastal communities often experience milder winters and cooler summers than further inland because of which of these factors

Whiel you didn't provide any answers the correct answer is due to the presence of the sea and the accompanying winds. Both of these factors help coastal communities retain more heat during the winters and are also able to cool off easier in the summers, thus having cooler summers and milder winters.

Sorry sir you did not give us the graph i typically but i'm very confused my conclusion is you're missing valuable information in the question