The section Service and Process Management belongs to Linux Fundamentals module.
Download the VPN file from HTB Academy and run the following command in the same directory:
sudo openvpn academy-regular.ovpn # Make sure you have openvpn installed.
Use grep to filter out the desired output:
systemctl list-units --type=service | grep "Load AppArmor profiles managed internally by snapd"
Submit the service name as the answer. The unit name is the first column.