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Nuclear fusion that takes place between hydrogen atoms.

Step-by-step explanation:

The answer is B.

Step-by-step explanation:

Like most stars, the sun is made up mostly of hydrogen and helium atoms in a plasma state. The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons.

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .