Private wants are those we use individually and provide for ourselves
Example:
Food
Furniture
Phone
A substitute is a product which can be used instead of another product
Example
Butter = Margarine
Electricity = Solar Panel
Complementary wants are goods that needs another good before they work
Example
Car = Petrol
Pool = Water
Phone = Charger
Collective wants that all consumers require and are used by the community as a whole. They are usually provided by the government and are paid for uses of taxes