Answer:
vertical complementary strategy 
Step-by-step explanation:
Vertical complementary strategy - 
It is a type of partnership between any two firms or company , is known as vertical complementary strategy . 
This strategy enables to produce some particular goods or services , it also helps to expand the business and the relationship between two business get stronger . 
This type of relationship is formed , when both the parties exclusively works for each other . 
hence , from the question , 
The correct term for the given information is vertical complementary strategy .