What mountains in the north of Italy protected Rome from invaders?

1. The Alps
2. The Poconos
3. The Atlantic
4. The Himalayas

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.

slavery because it wasnt a role of government