List 3 cultural and scientific developments of the american civilizations ?

The three cultural and scientific developments of the American civilizations are

Explanation:

There is certainly an American civilisation, but it spans the entire hemisphere and could if seen from Mars, be described as a unique modern project which seeks to develop progressive republics in acutely racialized communities.

Multi cultural ethos: The United States of America's culture comes mainly from the west but has a multicultural ethos which includes African, Native American, Asian, Pacific, and Latin American peoples and their cultures.

The space age: It was practically running in conjunction with the Atomic Age. Robert Goddard was among the first experimenters in the field of jet propulsion systems. Goddard experimented on liquid oxygen and petrol to propel rocket in the air in his modest laboratory at Worcester in Massachusetts and in 1926 he successfully launched the world's first 12.5-metre-high liquid-fuel rocket.

Telecom and Technology: The USA has been a major part of the advancement on telecommunications and innovation for the last 80 years. For example, AT&T's Bell Labs pioneered the American technological revolution with a number of innovations including the first functional light-emitting diode (LED), the transistor, the C programming language, and the Unix OS.

a and b!

dfroos means which is a and b