Tundra, sub-arctic, humid continental, and semi-arid are the climatic sub-regions found within (hint: use the map below to you answer this item.) koppen classification system map peru egypt russia australia

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

i think u are supposed to write a long-essay answers to the long-essay questions