Where does this last one go ,help pls

Look at the map of cities in the united states at the turn of the twentish century what impact did railroads have on cities across the united states at the turn of the twentish century

The 20th amendment, also called the lame duck amendment, decreased the amount of time between the presidential election and the inaugration of the new president. what are the advancements that allowed for this amendment?

Does anyone know why the second great awakening occurred? (i need an answer asap because this is a question on my assignment! < 3 : ))