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Explanation:
Nuclear fusion occurs in the core of a star. Stars use the process of nuclear fusion to convert hydrogen to helium, and this process provides energy for the star, making the star very hot and bright. When the star runs out of either hydrogen or helium and nuclear fusion in a star's core stops, the star is no longer creating energy. Without energy, the core cools and the outer layers of the star begin to expand and become less bright, and the star will eventually either collapse or explode.
Explanation:
Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
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i do not understand i need a translation
Explanation:
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The elements of movement are space, time, and force (energy).
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