Final answer:
The claim that milk, cheese, spinach, and collard greens are rich in calcium is true. Calcium is found in both dairy and non-dairy sources, including green leafy vegetables, some fish, nuts, and fortified foods.
Step-by-step explanation:
The statement that foods rich in calcium include milk, cheese, spinach, and collard greens is true.
Calcium is an essential nutrient crucial for bone health, among other bodily functions. While dairy products such as milk and cheese are well-known calcium sources, it is also abundant in a variety of other foods.
For instance, green leafy vegetables like spinach and collards are good non-dairy sources of calcium. Additionally, other calcium sources include broccoli, intact salmon, canned sardines with bones, nuts, beans, seeds, and certain shellfish.
Fortified foods and beverages can also provide calcium, especially for those who prefer or require dairy-free options.