Final answer:
Among the given options, almonds are naturally calcium-rich and can be fortified. Yoghurt is a good source of calcium and probiotics but isn't typically fortified. Cheese contains natural calcium but usually is not fortified with additional nutrients.
Step-by-step explanation:
Not all calcium sources come from dairy products. Foods like green leafy vegetables, broccoli, nuts, and beans can also contribute to your daily calcium intake. However, certain foods are more likely to be fortified with calcium and other nutrients. Among the options provided:
- Almonds naturally contain calcium and are sometimes further enriched with nutrients.
- Yogurt is a dairy product that is a natural source of calcium and often contains active cultures of probiotics.
- Sardines with their bones are an excellent natural source of calcium and don't usually require fortification.
- Cheese, like other dairy products, naturally contains calcium. Although not often fortified, it is a significant source of this nutrient.
To increase their nutritional value, some foods and beverages may be fortified with calcium and other nutrients. This is more common in non-dairy milk substitutes like soy or rice beverages and some breakfast cereals and juices.