National parks reduce the human impact on land by preventing human development.
Answer: Calcium
Explanation:
The Vitamin D is an important vitamin and it is related with the element calcium in the body. The Vitamin D is responsible for the absoprtion of calcium in the body present in the food. In the deficiency or depletion of the Vitamin D in the body is likely to affect the calcium levels. The calcium is the main element present in the bones and the teeth. Calcium helps to build bones. In the condition which involves the depletion of Vitamin D levels the calcium levels will also deplete. This will result in conditions like oesteoporosis, rickets and other bone deformities.
Thus people in the northern climates receiving low sunlight, will likely to receive low Vitamin D and will likely to develop bone related problems due to low calcium levels.
Answer:
Before the Civil War, Philadelphia was a center of shipyards and manufacturing.
Explanation:
At the beginning of the 19th century, Philadelphia experienced an important economic growth thanks to its agricultural and mining wealth; the construction of routes, canals and railroads allowed the city to maintain its privileged position in the industrial revolution. The textile industry, the confection, the metallurgy, the manufacture of paper and of railway material, the naval construction in the shipyards and the agricultural industry were the main industries of the 19th century. Philadelphia was at the same time a financial center of prime importance. During the Civil War, the factories of the city supplied the armies of the Union.
In anatomical position, the radius is lateral to the ulna.
