Final answer:
Curtis, who is critically evaluating diet supplement claims, best demonstrates scientific literacy by using scientific principles to inform personal decisions.
Step-by-step explanation:
Out of the scenarios presented, Curtis who is researching claims about a new diet supplement before buying it is demonstrating scientific literacy. Scientific literacy involves using science content knowledge to make informed decisions. By researching claims, Curtis is using critical thinking and skepticism, engaging in behavior that aligns with the scientific method which includes posing scientific questions, evaluating evidence, and making decisions based on this evaluation. This example mirrors the scientific literacy goal of being able to make sense of science encountered in everyday life and using scientific understanding to inform personal choices. In contrast, Paulo, while engaged in advanced study, isn't explicitly mentioned as applying his knowledge to make decisions. Shalayne's reliance on intuition for a biology exam instead of scientific knowledge and Olivia's memorization of naming rules demonstrate knowledge of science but do not necessarily involve using that knowledge to make informed decisions based on evidence, a key aspect of scientific literacy.