Food variety means eating a wide variety of foods from each of the five food groups, in the
amounts recommended. Eating many different foods helps maintain a healthy and interesting diet
which provides a range of different nutrients to the body. Eating a variety of foods promotes good
health and can help reduce the risk of disease.
check out the fact sheet from better health channel
http://www.betterhealth.vic.gov.au/bhcv2/bhcpdf.nsf/ByPDF/Food_variety_and_a_healthy_diet/$File/Food_variety_and_a_healthy_diet.pdf