The picture below shows the model of a raisin bread before and after it is baked. Raisin bread dough is dotted with raisins, the dots are close together. As the bread bakes it expands and the raisins are spread further apart.

What does the model of the rising raisin bread demonstrate about the origin of the universe?

expansion of the universe causes galaxies to increase in size
expansion of the universe causes galaxies to move further apart
gravitational force determines the distribution of matter in the universe
gravitational force between two galaxies depends on the distance between them