The best answer would be:
1. Private goods
2. Public goods
Private goods are scarce, or in other words very limited. These are goods that are owned by an individual that is obtained in exchange of money. Now this limits the ability of another to consume it. Private goods are categorized as excludable and rivalrous.
Because it is limited, not anyone can get it, thus creating competition.
Public goods are the opposite. Anyone can use it and anyone can obtain it. For example, air, public defense, streetlights. All these things are obtainable and even when one will consume, there is more for others to make use of.
I hope this did not confuse you more. Good luck!