Answer:
I am the minerals vital for your good health.
What is black when you buy it, red when you use it, and gray when you throw it away?
I cannot be burned in fire or drowned in water. What am I?
I am very afraid of doing scary activities.
What can run but never walks licks but never talks has a bed but never sleeps has a mouth but never eats?
A little house full of meat, no door to go in and eat.