Take context from the input text and decide on the accurate relationship between 'Kmart' and 'retail' from the options provided.
Options: location of formation, creator, industry, founded by

He said while competition was expected to remain high in the food and grocery sector, Coles and the conglomerate’s other retail businesses — Bunnings, Officeworks and Kmart — all had good sales momentum going into the 2016 financial year.
industry