What food is high in calcium?

Yogurt is considered a food that is high in calcium, making it an excellent choice for individuals looking to increase their calcium intake. Calcium is essential for maintaining bone health, as well as for various physiological functions such as muscle contraction and nerve signaling. Dairy products, like yogurt, are particularly well-known for their high calcium content, often containing more than 400 milligrams per serving, which contributes significantly to the recommended daily intake for most adults.

In contrast, while apples, rice, and bread can provide various nutritional benefits, they are not significant sources of calcium. Apples are primarily composed of water and carbohydrates, rice mainly provides carbohydrates with some B vitamins, and bread, especially white bread, typically has a low calcium content unless it's fortified. Whole grain breads may contain slightly more calcium, but not in the amounts found in dairy products like yogurt. Therefore, yogurt stands out as the best answer due to its substantial contribution to calcium intake.