Question

what do we call the circular pattern caused by the rising and falling of a fluid that is heated and rises then cools and falls?
a radiation current
a convection current

Explanation:

Convection currents occur when a fluid is heated, rises, cools, and falls, creating a circular - like pattern. Radiation is the transfer of energy in the form of electromagnetic waves and is not related to the described fluid - motion pattern.

Answer:

a convection current