Abusiness subunit that consists of a collection of functions or departments that share responsibility for producing a particular product or service is known as a(n)

The answer is division. It is essential in business or a company as this carries out a function of having to divide and share tasks and responsibilities of the people and in regards of having to manage the products and services for the market.

Iwould say this sounds like a kind of niche marketing whereby different varieties of the same product are tailored to the individual needs/likes of the consumers in order to satisfy those particular needs and thus have successful sales. but while this may be niches, also they are all related to the teeth cleaning products so are segments of that single market, all related to it at least i would say i believe this would be correct.