What language are you referring to?
Which ever you need to use to communicate with other people
The pronoun is "it" and the antecedent is "a miniature glass hippopotamus".
Extra information:
The word antecedent is composed out of two Latin words: ante and cedere, and it literally means: the "preceding", meaning it refers to the word that precedes the pronoun, that the pronoun refers to. This is not important for the question, but it is important to remember that the antecedent is always in front of the pronoun!
Assuming the question should be:
What does this excerpt most suppose about the beliefs of the ancient Greeks?
The excerpt informs us that the Ancient Greeks believed that natural phenomena, such as storms, were controlled by different Gods who had control over specific things, such as Zeus controlling the skies. It also suggests that these gods could be vengeful, and would use their powers to harm humans on earth who had upset them in some way. <span />