What reaction fuels the burning of the sun?

Nuclear fusion reaction

Explanation:

The nuclear fusion process refers to the condition when two nuclei of smaller atoms are combined with one another to form a heavy nucleus, resulting in a large amount of energy.

This process takes place extensively in the core of the sun that helps the sun in burning, releasing a significant amount of heat energy.

This fusion reaction emits photons of higher energy, which are commonly known as the gamma rays, and it subsequently travels through the radiative layer of the sun that surrounds its core.

The reaction of nuclear fusion thereby results in the conversion of hydrogen into helium as well as helps in the conversion of mass into energy.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do