The reason why the nuclear reactions that occur in the center of the Sun are critical to life on Earth is: C. life on earth depends on the heat and electromagnetic radiation released by the sun's nuclear reactions.
A nuclear reaction can be defined as a type of chemical reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another radioactive element's atom.
This ultimately implies that, a nuclear reaction is always accompanied with the release of energy.
On a related note, the Sun is typically characterized by nuclear reactions taking place at its center, which result in the release of radiant (heat) energy and electromagnetic radiation into the solar system.
Basically, this radiant (heat) energy and electromagnetic radiation are essential and very important to life because they are applicable and beneficial to humankind in several areas.
For example, radiant (heat) energy from the Sun in the morning, is a good source of vitamin.
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