The correct answer to the question is : Photosphere.
Step-by-step explanation:
There are various regions in sun like photosphere, chromosphere, corona etc.
The sunspots are magnetic storms which are darker and cooler. These spots are found generally in the photosphere region of the sun.
It is a temporary disturbance or phenomenon which occurs in this region, and makes that region more darker than surrounding ares.
Hence, the correct answer to the question is photosphere which contains sunspots.