Answer: Trust
Step-by-step explanation:
Trust is defined as having faith, confidence or hope in something or someone. Trust is the most vital business asset one can manage in relationships with employees, clients, customers, and stakeholders.
An economy will works only when there's trust as every interaction is a medium of nurturing trust and building relationships. In the question, there's a great trust between the firm and supplier. This has resulted in a good relationship between both parties.