which is correct about warm currents?

a they are surface currents
b they make landmasses warmer
c they are denser than cold currents
d they move from the poles to the equator

All of the given options are correct about warm currents:

a) Warm currents are surface currents, meaning they flow near the surface of the ocean.
b) These warm currents can indeed make landmasses warmer by transferring heat from the ocean to the nearby coastal areas.
c) Warm currents are generally denser than cold currents due to the higher temperature and lower salinity of the water.
d) Warm currents generally move from the poles to the equator, transferring warm water from higher latitudes towards the lower latitudes.

pick only one

b) They make landmasses warmer