In this case, you can appropriately select:
There is correlation and not necessarily causation for the statement.
Explanation:
- Correlation indicates that there is a relationship between two variables (in this case, the amount of exercise and happiness levels); as one variable increases, the other tends to increase as well.
- Causation implies that one variable directly causes the change in another. While exercise can contribute to increased happiness (due to endorphin release and other psychological benefits), correlation does not confirm that exercise is the sole cause of higher happiness levels. Other factors (such as social interactions, diet, mental health, etc.) could also influence happiness.