Answer:
An agreement.
Step-by-step explanation:
A contract can be defined as an agreement between two or more parties (group of people) which gives rise to a mutual legal obligation or enforceable by law.
Mutual assent is a legal term which represents an agreement by both parties to a contract. When two parties to a contract both have an understanding of the parameters, terms and conditions surrounding a contract, it ultimately implies that they are in agreement; this is generally referred to as mutual assent.
Hence, an agreement is a component of the contract documents which actually formalizes the contract and is signed by the Owner and the Contractor.
In the event of a breach of the contract by any of the parties involved (the owner or contractor), the contract agreement would be referred to for proper legal purposes.