¿Qué nombre reciben los conflictos donde se involucran varios países?

Which of the following terms describes the layers of air surrounding the earth ?

How does central place theory explain patterns in the size and distribution of cities?

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust