Polar bears are capable of swimming over 40 miles in search of food. the population of polar bears is declining due to a shortage of available sea ice which can cause the polar bear to drown because it wasn’t able to reach its food before becoming too exhausted. the population continues to decline. identify which factor of climate change is causing this to happen to the polar bears.
a: shifting habitats
b: changing migration times
c: food shortages
d: warming of the ocean