Answer:
electrical telegraph
The ability to communicate across long distances improved dramatically during the Industrial Revolution. It began with the invention of the electrical telegraph by Samuel Morse in 1844. This system allowed for messages to be transmitted much quicker and cheaper than old methods.
The Cold War was a geopolitical, ideological and economic struggle between the two greatest world powers, the US and the USSR, former allies in WWII, and lasted from 1947 to 1991. It started because the USSR imposed a communist regime on the countries of Eastern Europe. The US and its allies were feared of the expansion of the USSR's power and the spread of communism, so America's response was the Marshall Plan. The official policy of US became <em>containment</em> of communism.
Scientific theories said that dark-skinned people were less intelligent than white people and misguided theories justified the passage of laws that kept African Americans from voting.
Answer: <em>B. The ironclad
</em>
Explanation:
The main battle between ironclads occurred on 9 March 1862, as the defensively covered Monitor was conveyed to shield the Union's wooden armada from the ironclad smash Virginia and Confederate warships. With the clash of Hampton Roads, maritime fighting changed forever. Ironclads were warships intended to be impenetrable to foe shot and shell by the excellence of their iron-shielded wooden structures.
Different names for these boats incorporate rams, defensive layer clads, iron gophers, iron elephants, iron pine boxes, turtle-backs, and mud-smashers. So incredible were the ironclads that they upset an ancient axiom of naval warfare that forts were stronger than ships.
Answer: i want to help but i dont understand
Explanation:
