The freedom rides, freedom summer, and the march on Selma are evidence of what idea during the civil rights movement

Non-violent protesters were often victims of violence and aggression.

Explanation:

The Civil Rights movement by African Americans saw different forms of protest such as the freedom rides, freedom summer, and the march on Selma. These tactics showed that even though the protesters were non-violent, they were still met with aggression and violence.

Freedom Summer was a voter registration drive which was aimed at fighting local intimidation of black voters from voting centres across the country. Freedom Riders was a ride by protesters in buses in the South to protest the segregation laws by boarding buses in mixed racial groups.

March on Selma was a protest march against the injustice and murder of a protester Jackson, to which there was an agreed march to the state capital, Montgomery.

these conditions long with a short growing season made farming difficult.

explanation:

the north has a climate of warm summers and snowy cold winters. the terrain is rocky, hilly, and not good for farming.