Answer: A. Comparative advantage, because products can be made more efficiently in the southern United States and Mexico. Operating costs and wages are lower, and the manufactured products are easily transported to major United States markets.
Explanation: Comparative advantage of a location is the ability to produce a good at lower cost than elsewhere. Lower wages, as well as lower operating costs in Mexico and Southern states achieve this comparative advantage by reducing total cost. Their locations are still quite close to the Midwest and North east, in contrast with popular outsourcing locations such as China. It therefore makes sense to relocate factories to these locations.
The major difference between Earth and the other planets in our solar system is that Earth has an atmosphere. The atmosphere is the reason why Earth is livable place.
Tundras and deserts have a number of similarities such as their lack of water or how organisms that inhabit them are have special features to survive their extreme weather. Both are nearly unsustainable for human life and have just like the tundra, deserts have freezing temperatures at night.