The picture below shows two galaxies. Which of these statements best describes a similarity between the two galaxies?
a)Both have elongated centers.
b)Both have shapes determined by gravitational forces.
c)Both change their shape from time to time.
d)Both are held together by electrostatic force.

I think its B

Explanation:

Because all I know is that galaxies are defined as the system which contains billions of stars bind together by gas or dust and held together by gravitational forces.  There are also three types of galaxies which are elliptical, spiral, and irregular shaped and all galaxies have different shapes of centers.