Final answer:
The correct answer is a) Contract. An agreement between two or more parties for the doing or not doing of some definite thing is called a contract.
Step-by-step explanation:
The correct answer is a) Contract.
An agreement between two or more parties for the doing or not doing of some definite thing is called a contract. Contracts are legally binding and enforceable agreements that outline the rights and obligations of each party involved.
For example, when you purchase a phone and sign a contract with a service provider, you agree to pay a specific amount of money in exchange for a set package of phone services. This agreement is a contract that both parties are obligated to fulfill.