Question

what causes seasonal changes in the depth of the mixed layer? surface winds and storms salinity changes pressure differences ocean currents

Explanation:

Surface winds and storms play a major role in mixing the upper - layer of water in the ocean. Seasonally, stronger winds and more frequent storms can increase the depth of the mixed layer. Salinity changes, pressure differences, and ocean currents have more long - term or regional effects rather than being the primary cause of seasonal changes in mixed - layer depth.

Answer:

Surface winds and storms