A statement by the author in the article is that children should participate more often in studies of diversity in the media.
This statement has evidence in the excerpt presented, as this excerpt explains how the lack of diversity in the media can have negative emotional effects on children.
Media diversity promotes representation and this allows children to see themselves in different stories, as they identify with the characters' characteristics, culture, and ethnicity. This is important for children's self-recognition and for this reason, children are important in media diversity studies.
More information about ethnicities is at the link:
https://brainly.com/question/11916588