Valentina has a new baby girl. She went to the grocery store and was overwhelmed by how many types of diapers Pampers offers $($e$.$g$.,$ Swaddlers, Swaddlers Sensitive, Swaddlers Overnights, Baby$-$dry, Cruisers$).$ Which marketing concept explains why Pampers has so many types of diapers that appeal to different types of consumers?

Relationship marketing

Market opportunity

Market segmentation

Strategic window