Answer: The chromosphere is the source of ultraviolet light and the Corona is the source of X-ray.
Step-by-step explanation:
Chromosphere is above the photosphere and the part of the sun that can be seen. It is below the Corona and it is usually red because of much of hydrogen present. It is the source of ultraviolet light.
Corona is the upper layer of the sun. The bright light of the sun hid the Corona. It is the source of X-rays. This is because X-rays can only be emitted by hot gases and Corona is very hot, it has millions of degrees to emit x-rays.