Respuesta :

Supergiant that are old enough to be fusing helium instead of hydrogen this process releases more energy causing the stars outer layer to swell. When a supergiant runs out of fuel it explodes as a type of supernova
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Supergiant  stars, such as Betelgeuse, have such high luminosity because they are fusing helium instead of hydrogen.

What are supergiant stars?

Supergiant stars are among the most massive and most luminous stars.

Supergiant  stars, such as Betelgeuse, have such high luminosity because they are fusing helium instead of hydrogen  and this process releases more energy causing the stars outer layer to swell.

When a supergiant star runs out of fuel it explodes as a type of supernova.

Learn more about supergiant star  here: https://brainly.com/question/9336681

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