Several sources have noted that Vitamin D is more of a hormone than a nutrient. The substance controls the concentration of calcium that is present in our system especially in the blood. The hormone is essential and vital in strengthen bones.
Hence, the answer to this item is letter A. True.
one is relative to whats happening now and the other is what happened in the past hope this helped!
Standing wave - A standing wave is a wave that remains in a constant position.
It's important because it helps you measure things. The prefixes are telling you the distance or meters, etc.
It could be compared to sand
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