Refer to the exhibit. A Cisco Catalyst switch is configured to allow only one MAC address to be learned manually on interface gig0/2. Which command must be run to dynamically learn the devices that…

The `switchport port-security mac-address sticky` command enables an interface to dynamically learn MAC addresses that connect to it. Once learned, these MAC addresses are saved into the running configuration as sticky secure MACs, allowing them to be retained even after a switch reboot if the configuration is saved.

The command `switchport port-security mac-address auto` is not a valid command for enabling dynamic MAC address learning in Cisco IOS port security.

The `switchport port-security aging` command configures the aging time or type for secure MAC addresses, but it does not enable the dynamic learning function itself.

The `switchport port-security maximum 1` command sets the maximum number of secure MAC addresses to one, but the `auto` keyword is not valid in this context for enabling dynamic learning.