Unity is important for an effective functioning of a country and for prevention of conflicts: if there was no unity, people could not finish bigger projects that require cooperation with others.
Diversity is important for innovation and creativity: if we were all the same, little would change and sometimes change is for better.
Answer: marketing channel
Explanation:
A marketing channel is the path that the product travels through before it reaches the consumer , from the point it get produced to where it will be consumed. Manufacturers produce the product but don't usually sell it straight to the customers hence they utilize marketing channel to make sure it get to the customer such as through department store and vending machine.
Marketing channels also includes wholesalers and retailers.
I would have to go with Agricultural society mainly because it sounds more like what the reading is talking about, a group.