I think the answer is overseer.
Answer:
The 14th amendment changed the Government by giving the roles if citizens into the Politics and it also protected the rights of the citizens
Niehls Bohr discovered that the atom has separate energy levels.
The model he created based on this discovery worked, but only on Hydrogen atoms because Hydrogen atoms only have 1 electron, but all higher elements have 2 or more.
Answer:
O steam engine
Explanation:
The invention of the steam engine and the development of the railroad system were instrumental in creating the Industrial Revolution beginning in the late eighteenth century and continuing into the nineteenth century.
The answers are a,c, and d. :) Hope this helps!