Final answer:
A Client-Server model is most appropriate for a publishing company with roughly 20 employees as it provides centralized control and security.
Step-by-step explanation:
The most appropriate networking model for a publishing company with roughly 20 employees who collate new articles, photographs, and video stories is a Client-Server model. This is because a Client-Server model provides centralized control and security. With a Client-Server model, employees can access and share files and collaborate on projects securely through a central server. This ensures that the company's data is protected and allows for efficient management of resources.