Glenn is heating water in a teakettle. the hotter water at the bottom of the kettle rises. the cooler water near the top sinks and warms. which kind of transfer of heat is this?
conduction
convection
radiation
transmission

Option (b) is the correct answer.

Explanation:

A process in which a fluid is heated then cold material (more dense) sinks at the bottom whereas hotter material (less dense) rises at the top is known as convection.

In convection, heat transfers from burner to the vessel and further it reaches to the fluid present into the vessel.

Therefore, we can conclude that the given situation represents convection as the kind of transfer of heat.

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im doing test rn im going with 2 but ill give answer if itss wrong,   : )