The corona
A.
emits the Sun's visible light that we see.
B.
is the outermost layer of the Sun's atmosphere.
C.
is the Sun's deepest interior layer.
D.
is a dark spot on the Sun's photosphere.

B. the outer most layer of the sun's atmosphere

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive