A

Fraunhofer lines are dark lines in the spectrum of light from the sun, caused by the absorption of specific wavelengths of light by elements in the sun's atmosphere.
Step 1: The sun emits light across a broad spectrum due to the high temperatures in its core.
Step 2: When this light passes through the cooler layers of the sun's atmosphere (specifically the photosphere), certain wavelengths are absorbed by specific elements.
Step 3: These absorption lines were first observed by Joseph von Fraunhofer in the early 19th century and are now known as Fraunhofer lines.
Step 4: Among the given options, the elements in the photosphere do indeed contribute to the absorption lines, while the elements in the chromosphere primarily play a lesser role in comparison.
Therefore, the correct answer is Option A.