The term used for the preparation of a financial blueprint of an organization's future operations is "Financial planning."

So, the correct answer is:

2. Financial planning

Sure, I'd be happy to explain each of the terms you mentioned:

1. Financing Decision: The financing decision is a crucial part of financial management. It involves determining the appropriate sources of funds to finance a company's operations and investments. This decision focuses on the mix of equity and debt a company should use to raise capital.

2. Financial Planning: Financial planning is the process of outlining an organization's financial goals and creating a plan to achieve those goals. It involves budgeting, forecasting, and developing strategies to manage and allocate financial resources effectively. 

3. Capital Structure: Capital structure refers to the composition of a company's capital, which includes both equity and debt. Equity capital comes from shareholders' investments, while debt capital is borrowed money, typically in the form of loans or bonds. 

4. Investment Decision: The investment decision, also known as capital budgeting, involves evaluating and selecting investment projects that are expected to generate returns for the organization. 

In summary, financial planning is the process of creating a financial blueprint for an organization's future operations. It involves making investment decisions, considering the appropriate capital structure for financing, and ensuring the funds are available to execute the plan, which relates to the financing decision.