During the 1960s, a federal civil rights act became necessary because
a the president did not support civil rights.
b it was the only way to end jim crow laws.
c northern states had passed different civil rights laws.
d southern states had ended discrimination.

During the 1960s, a federal civil rights act became necessary because: B it was the only way to end Jim Crow laws.

The Jim crow laws created a racial segregation in United States that caused the racial minorities unable to obtain equal rights and service from the establishments in the country. The federal civil rights act in 1960 abolish this segregation and became the first step of racial equality in united states. 

It turns into vapor and goes into the atmosphere