a. Both religions have a panopoly of gods and goddesses. Also god and goddess had both a human and animal form.
b. They have a lot of worldly struggles that any normal human would have, for example the eye goddess becomes angry with Ra and runs away, which a human would do if they were angry. So through mentality, they have daily human struggles.
c. Through art, sculptures, buildings, hieroglyphics, wall paintings, and poems.