Select the factors that made travel on a steamboat dangerous pirates on the river hidden obstacles in the water collisions swift current changing channels native american attacks

  the domino theory states that  if one country in a region came under the influence of communism, then the surrounding countries would follow in a  domino  effect.

Electricity is the answer

The question of what caused the full effects of the radical stage, also called the second french revolution by some historians, which shook the political and social reforms in france have caught the attention of many scholars, particularly because of principles implemented during this stage which is contradictory to the fundamental principle of the french revolution itself, by using dictatorship to create equality.

The code of hammurabi was from mesopotamia (babylon) it container a legal code based on the principle of an eye for an eye.