Will Carington, works for Noodle
To find out more about this position, click the "apply" button on the job's Noodle listing. You'll then be taken to the site where the job was originally posted, in this case Internmatch.com. There you'll be able to find a full description of the application requirements, including whether or not you need to be a high school graduate, current college student, etc.
In general, high school students can certainly apply to work as interns in any number of fields, including online media. To learn more, check out this article on high school internships. Hope this helps, and good luck!