What is the difference between a biome and a microhabitat

A micro habitat is small habitat that exists on a normal habitat, where as the biome describes the type of area on a much larger scale. for example; a desert is a biome and in that desert there is an area where grass grows and lot of mice live in that area (habitat), and there is a part of that habitat where one of the mice feeds (micro habitat). a micro habitat can also exist on another animal (parasite).

Carbon dioxide is the correct answer