Explanation:

- Fiscal Deficit: Generally refers to when a government’s total expenditures exceed the revenue that it generates, excluding money from borrowings. It doesn't directly affect the Current Account Balance, which is more concerned with international trade and finance.

- Net Income from Abroad: Part of current account, includes earnings from foreign investments and compensation to employees abroad.

- Foreign Aid: Can impact capital account or current transfers section of the current account. It can indirectly influence the current account, but it's not as direct.

- Trade Gap: Directly affects the current account balance as it involves exports and imports of goods and services.

- Correct Answer: Fiscal Deficit (Option: 1)