Answer:
Alexis can best rewrite her question as "Do foods that contain a high amount of fat cause brain cancer?" This question is more specific and focused, and it follows the format of a scientific question by asking about a relationship between two variables (fat in food and brain cancer) and the potential cause-and-effect relationship between them. The other questions provided are not appropriate for a scientific question because they are not focused on a specific relationship or cause-and-effect relationship, and they do not follow the format of a scientific question.