Question

the arctic ocean is bordered by greenland, canada, alaska, russia, and norway. once known as the frozen ocean, much of the ocean’s surface becomes a layer of sea ice for most of the year. however, not all of the water freezes. a polynya is an area of open water surrounded by sea ice. polynyas are found in the same place every year. they are very important to the ecosystem. north water, the largest arctic polynya, is about as large as lake superior in michigan. which of these cannot be found in the arctic ocean? a some frozen waters b lake superior c polynyas d north water

Explanation:

The text states that North Water (the largest Arctic polynya) is about as large as Lake Superior in Michigan, but Lake Superior is a separate lake, not part of the Arctic Ocean. Frozen waters are present as much of the Arctic Ocean surface becomes sea - ice, polynyas are areas of open water in the Arctic Ocean, and North Water is an Arctic polynya.

Answer:

B. Lake Superior