Macro-nutrients and Micro-nutrients by placing 20 different foods in the correct position.

Sure, I can help with that. But first, let's clarify what macro-nutrients and micro-nutrients are.

Macro-nutrients are nutrients that our bodies need in large amounts. These include proteins, carbohydrates, and fats.

Micro-nutrients, on the other hand, are nutrients that our bodies need in smaller amounts. These include vitamins and minerals.

Now, let's categorize 20 different foods into these two categories:

Macro-nutrients:

1. Chicken - Protein
2. Beef - Protein
3. Fish - Protein
4. Eggs - Protein
5. Tofu - Protein
6. Rice - Carbohydrate
7. Pasta - Carbohydrate
8. Bread - Carbohydrate
9. Potatoes - Carbohydrate
10. Olive oil - Fat

Micro-nutrients:

1. Spinach - Vitamins A, C, K, and B2, and minerals like manganese, folate, and iron
2. Broccoli - Vitamins C, K, and A, and minerals like folate, potassium, and selenium
3. Oranges - Vitamin C and minerals like potassium
4. Blueberries - Vitamins C and K, and minerals like manganese
5. Strawberries - Vitamins C and K, and minerals like manganese and folate
6. Almonds - Vitamin E and minerals like magnesium, copper, and manganese
7. Milk - Vitamins D and B12, and minerals like calcium, phosphorus, and iodine
8. Cheese - Vitamins A and B12, and minerals like calcium, zinc, and phosphorus
9. Yogurt - Vitamins B2 and B12, and minerals like calcium, phosphorus, and potassium
10. Salmon - Vitamins D and B12, and minerals like iodine, zinc, phosphorus, and selenium

Please note that many foods contain both macro-nutrients and micro-nutrients, but for the purpose of this exercise, I've categorized them based on their most prominent nutrients.