Answer: Relationship Behavior
Explanation: Thyimach, has been purchasing iron shafts from Metaljun for over a decade. There is a relationship of buyer and supplier developed among both of them. When Thyimach designs new model of machine Metaljun provides with new specification without informing Thyimach and Thyimach uses Metajun's supplies only. So this is a case of relationship behavior. Since the relationship was strong, Thyimach also didn't mind using the product and Metaljun knew it wouldn't be a loss for him.