Explanation:

- Capital Expenditure: This is money spent by a government or organization to acquire or maintain fixed assets such as land, buildings, and equipment. It is a component of the capital budget as it involves long-term investment.

- Investment Expenditure: Refers to spending on items that will potentially generate returns in the future. It's closely related to but not the exact term used in capital budgets, so this is not typically listed as a distinct component.

- Income Budget: This represents the planned income of an organization and isn't typically a component of a capital budget, which focuses more on expenditures rather than income.

- Budget Expenditure: This is a broad term that encompasses any spending plan, including operational and capital expenses, so it's not specific enough to be a component of a capital budget.

Capital Expenditure is indeed one of the components of the capital budget.