1) history
2) lesson
3) advice
The answer should be:
Animal & human power were generally replaced with steam power.
Involving us in world war 2
Answer:
Separation of Powers means that the three branches of government are separated. The three branches are. the Legislative- the part that makes laws. the Executive - the part that carries out (executes) the laws, the Judicial Branch - the courts that decide if the law has been broken.
hope this was helpful! c: