First, you find the simple subject and simple predicate.
If the '-ing' form of the verb is not part of the simple predicate, then determine how it is used in the sentence. If it's in a noun position, then it's a gerund. If it is used as an adjective, then it will be a participle.
Comic books are worthwile to read by everyone because they are another art form. Whether a book has photos, small print, boxes, whatever, they all have a meaning. The stereotype that comics book are just for kids or are only superhero related is outdated and leaves the wonderful world seeming closed off to so many.
Music that helps you concentrate while doing homework