Answer :
From the Sun's core the process of solar energy formation begins, thus the correct option is D.
What is solar energy?
Solar power is defined as the energy from the sun that is converted into thermal energy. Solar energy is the most cleanest and most abundant renewable energy source available.
Solar energy is created by nuclear fusion which takes place in the sun. Fusion occurs when protons of hydrogen atoms violently strike in the sun's core and fuse to form a helium atom. This process is known as a proton-proton chain reaction releases an enormous amount of energy.
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