1.
Wood → Sour → Anger
Fire → Bitter → Joy
Earth → Sweet → Worry
Metal → Spicy → Sadness
Water → Salty → Fear
2.
Too much salty food can hurt the Water element and kidneys. A person may feel tired or weak.
3.
Joe gets angry often and likes sour food. Anger and sour food are related to the Wood element. His Wood element may be out of balance.
He should relax, sleep well, exercise, and eat less sour food.