Refer to the input text as context and select the correct relationship between 'Kmart' and 'retail' from the available options.
Options: founded by, creator, location of formation, industry

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