In which of these situations is convection most likely the main form of heat transfer? a. warm air from a heater on the first floor of a house moves to the upper floors.
b. the sides of a metal pan become hot when the pan is placed on a stove burner.
c. a person gets a sunburn from lying on the beach too long.
d. an ice cube melts when a person holds it in his hand.

A.   Warm air from a heater on the first floor of a house moves to the upper floors.

Explanation:

As we know that in convection mode of heat transfer the thermal energy is transferred from one point to other point which the actual movement of the medium molecules.

When thermal energy is given to the medium particles then due to difference in the density medium molecules will move from one point to other point along with the thermal energy.

So here we can say that correct answer will be

A.Warm air from a heater on the first floor of a house moves to the upper floors.  

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i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!