<span>The big bang theory of the formation and expansion of the universe is supported by the observed
</span>Red shift
Answer:
the answer is C-in areas with different air pressures
Explanation:
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated.
Bauxite is considered an ore because of its hardness and it can be used as a metal.
