Why did alexis de tocqueville travel to the united states?

The main reason why Alexis de Tocqueville traveled to the united states was to observe American democracy in action, and to take note of what worked and what didn't, as many European countries were going through democratic revolutions of their own.

So, the third one.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.