How might diet and exercise contribute to a healthy brain?

Diet and exercise can both contribute to a healthy brain in a variety of ways. Eating a balanced diet that is rich in fruits, vegetables, and whole grains can provide the brain with essential nutrients that are necessary for proper functioning. Exercise can also help to improve cognitive function by increasing blood flow to the brain, which can help to improve concentration and memory. Additionally, regular exercise can help to reduce stress and anxiety, which can have a positive effect on mental health.