HELP Give brainlist
I need the answer now and have to be in your own words plz

Why did einstein write a letter to president roosevelt

Why did the outbreak of world war 2 create a need for new military bases across the country?

Why was the sixteenth amendment important to woodrow wilson’s efforts to regulate the economy? a) the sixteenth amendment lowered interest rates charged by banks. b) the sixteenth amendment allowed congress to levy an income tax c) the sixteenth amendment lowered tariffs on imported goods d) the sixteenth amendment allowed congress to break up monopolies