Milk, yogurt, and cheese are rich sources of calcium.

Meaning: This sentence explains that milk, yogurt, and cheese are good sources of calcium.

Choice of Words: Milk is a white liquid produced by female mammals to feed their young. Yogurt is a fermented milk product with a thick, creamy texture. Cheese is a solid food made from the pressed curds of milk. Rich means containing a large amount of something valuable or desirable.

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