Polaris, the North Star, can be used for navigation in Earth's Northern
Hemisphere because

because it is always positioned over the North Pole and it doesn't seem to move or is fixed.

Explanation:

In case you're lost or you don't have a GPS or a compass, you can always use the North Star, also known as "Polaris," in finding your direction towards the Northern Hemisphere. This star is noticeable because it illuminates in its brightness. In order to make sure you've spotted Polaris, you have to trace the "Plough" or the "Big Dipper." This is commonly seen alongside the Polaris.

Answer:   [b]:   "cultural" .

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.