Are having a balanced diet and maintaining personal and public hygiene the same or different? Why?

(N/A) Having a balanced diet and maintaining personal and public hygiene are different aspects of health,although both are essential for maintaining good health.
$1$. $A$ balanced diet provides the necessary nutrients for the body to function properly and build immunity.
$2$. Personal and public hygiene involves cleanliness of the body and the environment to prevent the spread of pathogens.
$3$. While they are different in their approach,they are similar in their goal: both are conditions essential for good health.
$4$. If both these conditions are maintained,the risk of contracting infectious diseases is significantly reduced.