Explanation:

- Loans: These involve both borrowings and lending between countries and can be long-term or short-term. They are a part of the capital account because they reflect the flow of money across borders.

- Foreign investments: This includes direct investments, such as building factories, and portfolio investments, like buying foreign stocks and bonds. These investments indicate financial transactions with foreign entities.

- Change in Foreign Exchange Reserves: When a country buys or sells foreign currency to control the exchange rate, it affects the capital account, as it reflects the country’s financial asset management.

Option 4: All of these components fall under the capital account.