What Consumers have in common is that, they are all living things that live off of hunting and eating to gain energy and survive (without eating/hunting they die).
examples : Cows , Pigs , Horses
Limiting factors of an ecosystem include disease, severe climate and weather changes, predator-prey relationships, commercial development, environmental pollution and more. An excess or depletion of any one of these limiting factors can degrade and even destroy a habitat.
The tundra biome has permafrost
B) An increase in the overall temperature of the Earth
B is the answer because global climate change is the increase of the overall temperature of the planet.
hope that helps :)