Answer:
Job enlargement
Step-by-step explanation:
Job enlargement, as the name implies, consists in widening the scope of a job, by adding more related tasks to it.
In this case, Emma's job is not only answering a phone, which is what typically a receptionist does, but also keeping records, welcoming people, and even mediating between visitors and managers, this last task likely requiring a great degree of responsability and social skills.
As a result, the scope of her job is now wider, and she has more tasks and responsabilities to meet.