Final answer:
Sea breezes and land breezes are caused by the difference in temperature between the land and the sea. Sea breezes occur during the day when the land heats up faster than the sea, while land breezes occur at night when the land cools down faster than the sea.
Step-by-step explanation:
A sea breeze is caused by the difference in temperature between the land and the sea. During the day, the land heats up faster than the sea, creating a low pressure area over the land and a high pressure area over the sea. As a result, cool air from the sea flows towards the land, creating a sea breeze.
A land breeze is the opposite of a sea breeze and occurs at night. The land cools down faster than the sea, creating a high pressure area over the land and a low pressure area over the sea. This causes the cool air from the land to flow towards the sea, creating a land breeze.
Return flow refers to the movement of air from areas of high pressure to areas of low pressure to balance the pressure gradient. In the case of sea breezes and land breezes, the return flow occurs in the upper levels of the atmosphere.
Learn more about Types of breezes caused by temperature difference between land and sea