Which two pieces of evidence most directly support the idea that the universe is expanding from one original point?

it is option 3

Explanation:

because as red shift occurs when object in a space is far from us, so many of the stars we know will be seen in red shift because they are far from us by 20 years the most of the starts we see will be in red shift

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.