Answer:
C
Explanation:
When surface temperature of a star gets higher it gets lighter (white or blue(when it is hotter it gets more bluish)) since giants have less surface temperature they are yellow or orange, where dwarfs are white or blue.
So, they have different colors because they have different surface temperatures.
Different organic molecules vary because they possess different functional groups and arrangement
The cell is considered the basic unit of life because everything alive has one or more cells.