Explanation
Click Network in the sidebar, then click Wi-Fi on the right. Scroll down and click Advanced to open the list of known networks. Click the More button. next to the network name, then choose Copy Password.

To delete a user on a Mac, you need to follow these steps12:
* Navigate to System Settings - Users & Groups. This is where you can manage the users and groups on your Mac. You may need to scroll down to see all the options.
* Click the lock icon at the bottom left of the window and enter your administrator password to make changes.
* Click the (i) button next to the user you would like to delete on Mac. This will show you more information about the user, such as their name, picture, password, and permissions.
* Click Delete User or Delete Group. This will prompt you to confirm your action and choose what to do with the user's home folder.
* Select Delete Account. This will remove the user and their home folder from your Mac, freeing up storage space. Alternatively, you can choose to save the home folder as a disk image or leave it as it is, in case you want to restore the user later.
* Click Delete User or Delete Group again to finalize the deletion.
References: Delete a user or group on Mac - Apple Support, Here's our guide on how to delete a user on Mac - MacPaw

This is the correct answer because turning on the firewall is the best way to protect your Mac from unwanted contacts from other computers when you are connected to the internet or a network. A firewall is a software or hardware system that blocks unauthorized access to your Mac by filtering the incoming and outgoing network traffic. The firewall can prevent hackers, malware, or other threats from accessing your Mac or stealing your data. You can also customize the firewall settings to allow or block specific apps and services from communicating through the firewall. To turn on the firewall on your Mac, you need to go to System Settings > Network > Firewall, and click the Turn On Firewall button. You can also click the Firewall Options button to see more settings and options. References: Block connections to your Mac with a firewall - Apple Support, A Practical Guide to Securing Your Mac | Reviews by Wirecutter

Universal Clipboard(copy on one device, paste on another) is a Continuity feature requiring same Apple Account and Wi-Fi/Bluetooth.
* Option A: iCloud Keychain is iCloud-based, not Continuity.
* Option B: Notifications sync but aren't Continuity.
* Option D: Siri is standalone.
* Option C: Correct-Continuity suite.References: Apple Support - "Use Continuity" (support.apple.com
/HT204681).

Restoring an iPhone or iPad from an iCloud backup depends on a stable and functioning network connection because backup content must be retrieved from iCloud. When problems occur during an iCloud backup or restore process, Apple recommends verifying network connectivity and, where appropriate, trying another Wi- Fi network. Therefore, option C is the appropriate troubleshooting action. DFU mode is a substantially different recovery procedure and is not the normal response to an iCloud restore error. Turning off Find My or signing out of the Apple Account also does not address a network-related restore failure and can interfere with access to the backup. Using another reliable Wi-Fi network helps determine whether the failure is being caused by the current network, router configuration, filtering, or internet connectivity.