The USA wanted to prevent areas of the world falling under Communist influence. The Cold War was at its height in the late 1940s and early 1950s, when the French appealed to the USA for aid. The US government saw Vietnam as another Korea.
Answer:
1. Telegraph communications
2. Dynamite
3. Photograph
Explanation:
1. Telegraph communications - IMPACTED IN COMMUNICATIONS
On 25 July 1837 Sir William Fothergill Cooke and Charles Wheatstone successfully demonstrated the first electrical telegraph, installed between Euston and Camden Town in London.
2. Dynamite - IMPACTED IN CONSTRUCTION AND INDUSTRY
Dynamite was invented by Alfred Nobel, a Swedish chemist, in the 1860s. Prior to its invention, gunpowder (called black powder) had been used to shatter rocks and fortifications. Dynamite, however, proved stronger and safer, quickly gaining widespread use.
03. The Photograph - IMPACTED IN SOCIAL DEVELOPMENT
In 1826, French inventor Joseph Nicéphore Niépce created the first permanent photograph from a camera image.
Answer 'A' correctly describes the Great Wall = It was built to protect Qin's empire from foreign invasion.
Apart from defense, the Great Wall included border controls, and regulation of goods. After Qin dynasty, other dynasties had used it, to maintain their territories.
Virtue is a quality, so it is A
