Explanation:
polar bear depend on ice so if it gets really hot out of a sudden the melt will melt away and it would be harder for them to live. and for grizzly bears if gets cold all out of the sudden the rivers where they get food turns to ice they'll food which is what they depend on (fish) will die and without food they'll die too.
Food, water, shelter, air, sunlight
Without mechanical ventilation to provide fresh air, moisture, odors, and other pollutants can build up inside a home. Mechanical ventilation systems circulate fresh air using ducts and fans, rather than relying on airflow through small holes or cracks in a home's walls, roof, or windows.
Answer:
It helps them make more than one of a species in the Earth. Without reproduction, humans and every other living organism wouldn't be on Earth.
Explanation:
^^
One reason could be that there are a high number of predators killing rabbits in large quantities. Another is there may not be enough vegetation for the rabbits. They may also have a different animal competing for the same kinds of plants they eat.
