Answer:
The technological changes included the following: (1) the use of new basic materials, chiefly iron and steel, (2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine, (3) the invention of new machines
Answer:
True
Explanation:
Russian astronaut Alexei Arkhipovich Leonov was the first man to walk in space.
pls mark brainliest
I believe the answer is D sorry if it is wrong