Can you swap BCH to BTC?

Could you please clarify for me if it's possible to exchange Bitcoin Cash (BCH) for Bitcoin (BTC)? I'm interested in understanding the process and if there are any specific platforms or exchanges that facilitate this type of swap. Additionally, I'd like to know if there are any fees involved in the conversion and whether the exchange rate is fixed or subject to market fluctuations. I'm new to the world of cryptocurrencies and would appreciate any detailed information you can provide. Thank you in advance for your assistance.