Ultimately, what do politicians use media to accomplish? to inform the public about themselves to focus attention on themselves to sell themselves and their messages to support their parties and then themselves

The correct answer is - to sell themselves and their messages.
The most important thing for a politician is to attract an audience who will vote for him or her. In order to do that, they need media. Media is there to help them 'sell themselves,' promote their ideas and opinions, as well as plans for the future. Based on how well they can sell themselves through the media, they will attract more or fewer people.

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.