Answer:
(config)# enable password secret
(config)# enable secret Encrypted_Password
(config-line)# password secret
(config)# enable secret Secret_Password
(config)# service password-encryption
Explanation:
To prevent all configured passwords from appearing in plain text in configuration files, an administrator can execute the service password-encryption command. This command encrypts all configured passwords in the configuration file. For more: https://ccnav7.net/what-command-will-prevent-all-unencrypted-passwords-from-displaying-in-plain-text-in-a-configuration-file-2/