Extraneous means that something is irrelevant or something that has nothing to do with a particular subject. I hope this helps! :)
b)It is to persuade people to join the gym.
The text begins with a description of the different things that the gym has to offer. It then goes on to specifically address the audience by using the word "you" and listing the hours that the gym is open for the audience's convenience. The text then discusses why the new gym is better than other gyms and continues to list the features that it thinks will be appealing to the people. The text ends with an incentive for people to join the gym before the end of the month. While there are details about a gym, the reason behind those details is to persuade people to sign up. The text does not give specific instructions about how to sign up or why exercise is important.
Basically athena made him stronger, bigger, almost god-like in appearance
