Answer :
Hot air inflating a hot air balloon is an example of convection (option B).
What is convection?
In physics, convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
A hot air balloon is a lighter-than-air aircraft consisting of a bag, called an envelope, which contains heated air.
When the air inside the balloon is heated, the molecules in the air begin to move around and spread out, and the air becomes less dense. he surrounding, colder air falls beneath the hot air. This forces the warm air upward, which pushes the balloon up with it. The moving warm air creates a convection current.
Learn more about convection: https://brainly.com/question/4138428
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