Answer:
public relations
Step-by-step explanation:
Promotional mix is the combination of various promotional methods by a business to meet its set goals.
It is made up of the following elements: advertising, sales promotion, public relations, personal selling, and direct marketing.
In the given scenario an invitation to news media to attend an interactive photography exhibit, which celebrated international and national parks is an attempt to improve the public relations of the event.
The news media is expected to publicise the event thereby meeting the Magazine's public relations need.