People remember a list of words better if they study and recall words in the same environment (like studying under water and recalling under water) than in different environments (like studying under water and recalling on land). This result supports the idea of

His decision to make these lifestyle changes is most likely based on his knowledge that they have higher rates of hypertension and obesity.
High amounts of salt can lead to many problems in anyone's body, this doesn't only refer to African Americans. However, if John doesn't exercise, he might get fat because he may be prone to obesity.