To remove a device from the network 'ENAUTO' using Meraki APIs, the engineer must send an HTTP DELETE request to the Meraki API endpoint for device removal. The correct line of code to be added should specify the DELETE method, the URL for the API endpoint, and include headers that typically contain authentication information. Option B is correct because it uses requests.request('DELETE', url, headers=headers) which specifies the DELETE method and includes both the URL and necessary headers. References: Automating Cisco Enterprise Solutions Official Cert Guide