Question

which layer of the suns atmosphere, considered its surface, does light come from?
outer core
chromosphere
photosphere
corona
a light year is
about 9.5 trillion years
about 9.5 million kilometers
the distance light travels in one year
300,000 kilimeters per minute

Explanation:

First Question (Sun's Atmosphere Layer)

The Sun's atmosphere has layers. The photosphere is considered the Sun’s visible surface from which light is emitted. The outer core is part of the Sun’s interior (not atmosphere), the chromosphere is above the photosphere (emits less light), and the corona is the outermost, tenuous layer (not the surface for light emission).

A light - year is a unit of distance, not time. It is defined as the distance that light travels in one year in a vacuum. “About 9.5 trillion years” is incorrect (mixes distance and time units), “about 9.5 million kilometers” is wrong (the actual distance is much larger), and “300,000 kilometers per minute” is the speed of light (not the definition of a light - year).

Answer:

C. Photosphere

Second Question (Definition of Light Year)