what is fixed cost ? What is the difference between fixed cost and variable cost?

What is this ? Just I want to know about this question answer?:)

A fixed cost is a cost like rent that stays the same during an acocunting period. It will not change based on production. Rent will not change if you operate a plant or not.

A variable cost is a ccost that does change like material and labor during a period. If you produce 1 item you pay a certain amount for labor and material, but if you produce 2 items then your cost will change, based on production.