The answer is the fourth one (d): Variety.
Explanation for each option:
a. Adequacy: This principle refers to ensuring that your diet provides all the essential nutrients, fiber, and energy in amounts sufficient to maintain health. It does not specifically address the selection of foods from each food group or varying choices within them.
b. Moderation: This principle involves consuming foods in reasonable amounts, not too much or too little, to avoid excesses or deficiencies. It focuses more on portion control rather than the selection and variation of foods.
c. Balance: This principle emphasizes consuming the right proportions of different types of foods to ensure a proper intake of nutrients. While it involves selecting foods from different groups, it does not specifically highlight varying choices within each group.
d. Variety: This principle calls for selecting foods from each of the food groups daily and varying your choices within each food group. It ensures a wide range of nutrients and reduces the risk of dietary monotony.
In summary, the principle that emphasizes selecting foods from each food group daily and varying your choices within each group is "Variety."