The possible disadvantage of using the graphic in “On-line Programs to Train Your Brain is: Because the graphic looks “child-like” readers may not take the author seriously.
What is the disadvantage of online programs?
Now, online programs used in training our brain doesn't take anything seriously because for example, during online classes, a lot of students are not as serious as they would have been physically which makes them to loose their marks and that's all caused by our brain cause we think we can learn it later and we don't but instead just ignore it.
Thus, the possible disadvantage will be that the graphic looks “child-like” readers may not take the author seriously.
Read more about disadvantage of online programs at; https://brainly.com/question/22317416