Final answer:
Sand dunes can migrate toward the ocean due to the wind's movement of sand particles from the windward side to the leeward side, a process influenced by daily changes in sea breezes, which are affected by the different specific heat capacities of water and sand.
Step-by-step explanation:
The wind can make sand dunes appear to migrate toward the ocean. This phenomenon occurs due to the wind transportation of sand particles from one location to another. As the wind blows, it picks up sand particles from the windward side of a dune and deposits them on the leeward side. Over time, this process causes the entire dune to move, or migrate, in the direction the wind is blowing, which can be towards the ocean in coastal areas.
Sea breezes play a role in this process as well. During the day, the land heats up faster than the water, causing air to rise over the land and cooler air to rush in from over the ocean to replace it, moving towards the shore. At night, this process is reversed, with the cooler land causing air to move from the land back toward the ocean. The specific heat capacities of water and sand influence these changes in air movement.