What are convection currents

Breifly, a convection current is a current in a fluid that results from convection.
But, in more detail: Convection is one of the three main types of heat transfer, the other two being conduction and radiation. Unlike the other two, convection can only happen in fluids,- liquids and gases. This is because the molecules have to be free to move.

Heat energy can transfer by convection when there is a significant difference in temperature between two parts of a fluid. When this temperature difference exists, hot fluids rise and cold fluids sink, and thencurrents (movements) are created in the fluid. 

Answer is arabian desert

The answer would be newton’s second law