Why is fuse closing?

Could you please elaborate on why the fuse is closing? Is it due to an overcurrent situation, where the electrical current exceeds the fuse's rating? Or is it because of a fault in the circuit, causing a short circuit that trips the fuse? Is the fuse aging and failing to withstand the normal operating conditions? Understanding the root cause of the fuse closing is crucial to prevent future occurrences and ensure the safety of the electrical system.