Answer:
:A currency with a flexible exchange rate is one that is determined by supply and demand in the foreign exchange market. Therefore, the most likely situation that would cause a currency to increase in value is an increase in demand for that currency relative to its supply.
This can happen for a variety of reasons, such as an increase in foreign investment in the country, an increase in exports, or a decrease in the supply of the currency due to government intervention or a decrease in the money supply.
For example, if a country has a strong economy and is seen as a safe place to invest, foreign investors may want to buy more of that country's currency, causing its value to increase. Similarly, if a country's exports become more competitive due to a decrease in the value of its currency relative to other currencies, demand for that currency may increase, causing its value to rise.