Final answer:
Trade policies can indeed alter a country's trade balance by influencing both imports and exports, and these changes can be due to tariffs, quotas, and subsidies. A balanced trade does not imply a balanced trade with each individual trading partner. Exchange rate variations can affect international trade flows, potentially prompting governments to fix exchange rates to stabilize trade.
Step-by-step explanation:
Trade policies have the capacity to alter a country's trade balance by changing both the import and export levels. These policies can include tariffs, quotas, and subsidies that directly affect the amounts of goods and services a nation buys from and sells to other countries. In particular, imposing tariffs or quotas can lead to a reduction in imports, while subsidies can increase domestic exports by making them cheaper for foreign buyers.
Additionally, when a country signs international trade agreements, it commits to certain levels of free trade which can also influence its trade balance. However, it is key to note that a balanced trade, where exports equal imports, does not necessarily mean that the country has a balanced trade with each individual trading partner.
Changes in exchange rates can significantly impact trade by altering the cost and competitiveness of a country's exports and imports. This can cause governments to consider fixing exchange rates to maintain stable international trade flows, especially when trade comprises a considerable part of the nation's economy.