Concentrates are the foods, rich in all the following except ______.

Reason: Concentrates are the foods which are low in fibre and contain high levels of proteins and other nutrients like carbohydrates and minerals. In general, animal feed includes: (a) roughage which is largely fibre, and (b) concentrates which are low in fibre and contain relatively high levels of proteins and other nutrients. Cattle need balanced rations containing all nutrients in proportionate amounts. Micronutrients are also needed for growth and they promote the health and milk output of dairy animals. Micronutrients are the nutrients needed in small quantities. These include dietary minerals needed by the body e.g. iron, cobalt, chromium etc. while macronutrients are required in large quantities e.g. carbohydrates, proteins and fats. Carbohydrates, proteins, and fats supply 90% of the dry weight of the diet and 100% of its energy.