Mesha reads a magazine article and finds out that a normal healthy adult should consume 25 grams of fiber a day. From the article, she also comes to know that fruits, vegetables, and whole grains are good sources of fiber. When Mesha visits a supermarket next, she purchases whole wheat bread instead of white bread and a greater quantity of fruits and vegetables than she did before reading the article. This change in Mesha's behavior is an example of _____.