Answer:
b
Explanation:
I believe that it is question be since the others don't have much tie to the question or don't make sense
Answer:
A, C
Explanation:
mucus acts as a barrier! all of the other things mentioned (D and E) are caused by white blood cells.
Apparent magnitude which is how bright a star appears from earth.
Absolute magnitude is how bright the star appears at a standard distance of 32.6 light years (or 10 parsecs).
Apparent magnitude is a measure of how bright an object seems to be at the point where it is observed. It expresses brightness on a scale , and gives brighter objects lower value and fainter objects higher value.
Absolute magnitude gives the brightness of an object if it were moved to a distance of 10 parsec from the sun