During convection, heat warms up a fluid, making the fluid less dense so it begins to RISE. As the warm fluid moves, it begins to COOL causing the fluid to SINK

The branch of science which deals with matter is called physic.

The correct answer is as follows:-

Convection is a form of heat transfer that is predominantly common in fluids, especially liquid and gas.

It occurs by the movement of a part of a substance from one place to another based on density and temperature differences. According to the law of thermodynamic, the heat transfer from the high temperature of the system to the low temperature the system.

A typical convection cell is made up of a liquid that is heated. The liquid part close to the heat source becomes warmer and rises due to its low density.

The part away from the heat source is denser and begins to sink.  This analogy is commonly demonstrated in a boiling pot of water.

Hence, the correct answer is mentioned above.

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Explanation:

Convection is a form of heat transfer that is predominantly common in fluids especially liquid and gas.

It occurs by the movement of a part of substance from one place to another based on density and temperature differences.

A typical convection cell is made up of a liquid that is heated. The liquid part close to the heat source becomes warmer and rises due to its low density. The part away from the heat source is more dense and begins to sink.

This analogy is commonly demonstrated in a boiling pot of water.