Fear is basically related to anxiety, you are afraid because you are anxious, you are anxious because you are afraid.
Sun represents authority, power, and strength. Sun is associated with government and politics. When Sun is placed favorably in your horoscope and you have a business, your business will flourish. Sun represents you, the placement of Sun tells what exactly you want in life.
Moon represents your mind, your mental statues, thinking process, foreign travel, foreign opportunities, blames, misunderstandings, and conflicts.