Explanation:

- Section 2(e): This section defines "Agreement" as a promise or a set of promises forming consideration for each other. It is the preliminary step toward forming a contract.

- Section 2(f): Refers to the definition of "Reciprocal Promises," which involves mutual promises forming the consideration or part of the consideration for each other.

- Section 2(h): An agreement enforceable by law is a contract. This section specifically defines what comprises a contract.

- Section 2(i): This section defines "Voidable Contract," which refers to an agreement that is enforceable by law at the option of one or more parties but not at the option of other(s).