__is the thermal energy transfer that occurs from the motion of fluid in a liquid or gas
a. radiation
b. conduction
c. convection
d. condensation

The correct answer is “Convection”

Explanation:

This is defined as the movement of particles in fluid or gas. As it heats up it turns out to be less dense and it rises moving away from the heat source. As it rises it will cool down and descends again, to later be warm up again and so on creating a circular motion as this phenome occurs.  

spectral lines lyman is one set

iron would move it is magnetic there is a mag field around the current in the wire