Development of the middle class, i hope that helped
It was "Albert Einstein" who <span>wrote to FDR in the summer of 1939 alerting him to a new form of energy, since Einstein was warning and informing FDR of the potential of "atomic energy". </span>
The Judicial Branch.
President of the United States with Senate's confirmation.
Hope it helps ^_^
Answer:
using spare time to invent and creat new things
Explanation:
