1: "Avocado is a nutrient-dense fruit rich in healthy fats and calories to help you gain weight."

2: "Nuts and nut butter are high in calories and protein, perfect for adding healthy weight."

3: "Whole milk is a great source of protein, healthy fats, and calories to aid weight gain."

4: "Quinoa is a high-protein grain that can help build muscle mass and promote weight gain."

5: "Sweet potatoes are a nutritious carbohydrate option to support healthy weight gain."

6: "Olive oil is a calorie-dense oil that can be drizzled on meals to increase calorie intake."

7: "Granola is a high-calorie snack that can be added to yogurt or eaten on its own."

8: "Cheese is a delicious and calorie-rich food that can help with weight gain."

9: "Bananas are a convenient and nutrient-dense fruit that can aid in healthy weight gain."