Why do currencies differ and on what basis do they determine the value of a particular currency in a different country?

Currencies differ due to various factors, including economic stability, inflation rates, interest rates, and geopolitical events. The value of a currency in a different country is primarily determined by exchange rates, which are influenced by supply and demand dynamics in foreign exchange markets. Additional factors such as trade balances, monetary policy, and investor sentiment also play crucial roles in establishing currency values. Ultimately, these elements contribute to the fluctuations and relative strengths of currencies against one another.