Answer:
Relational
Step-by-step explanation:
Relational power refers to the ability of an individual to form and maintain good relations and alliances with the people around, which benefit in the performance of tasks and operations and also serve organizational interest.
Forming relations a rare ability and not all individuals possess it. Those who do, are able to coordinate with others more effectively and this raises efficiency in an individuals performance.
In the given case, Mark demonstrates great ability of forming bonds and healthy relations with the people around which isn't merely restricted to his own departmental employees and thus he is able to get his job done more effectively. This depicts "relational power" of Mark.