Answer :

Supernova
The layer of the sun that is labeled (B) in the figure is called the corona.

Answer:

B. Corona.

Explanation:

The atmosphere of the Sun is divided into many consecutive layers from the outermost to the center. These layers corona – chromosphere – photosphere – convective zone – radiative zone – core. The layer as indicated in the question (B) is the outermost layer corona. Due the process of fusion in the core, we get heat and light from the sun.