Can banks ask where your money comes from?

Can I ask a question regarding the statement, "Can banks ask where your money comes from?" I understand that banks have a responsibility to comply with anti-money laundering and counter-terrorism financing regulations, but to what extent can they inquire about the source of my funds? Is it a standard practice for banks to ask detailed questions about my income or financial transactions? And if I'm not comfortable sharing certain information, what are my options or potential consequences? I'm seeking clarity on the balance between privacy and financial transparency in this context.