Final answer:
The key principles of healthy eating are variety, balance, and moderation.
Step-by-step explanation:
The key principles of healthy eating include variety, balance, and moderation. Variety involves eating different foods from all the food groups to ensure that you consume and absorb adequate amounts of essential nutrients. Balance refers to not consuming one nutrient at the expense of another, but rather getting appropriate amounts of all nutrients. Moderation means not eating to the extremes, neither too much nor too little.