What is a healthy and balanced diet and specifically for the elderly?

Protein, f,v, starch: 1/4 plate as protein, 1/4 plate as complex carbohydrates ( whole grains for example), 1/4 plate as vegetables, and 1/4 plate as fruit. Vary the complex carbohydrates to include legumes, potatoes, yams, and vary the vegetables in color. Aim for lean proteins- 3 ounces a serving of meat, chicken, fish. Try fresh fruits and vegetables, try to avoid fried foods and processed foods.