Final answer:
The region where energy is carried outward from the fusion at the Sun's core by photons is called the radiative zone, located between about 25% to 70% of the distance to the solar surface.
Step-by-step explanation:
The region where energy is carried outward by photons and particles from fusion in the Sun is known as the radiative zone. This zone extends from about 25% of the distance from the solar core up to approximately 70% of the way to the solar surface. Energy transfer in the radiative zone occurs very slowly due to the high density of matter, which causes photons to frequently interact with particles, changing direction and losing some energy in the process. This is in contrast to the convective zone, which is the outermost layer of the solar interior and uses convection to transport energy to the surface.