Which statements about hydrothermal vents are true? Choose all correct answers.

Hydrothermal vents can eventually close up.

Eight-foot long worms and blind fish may live near a hydrothermal vent.

Minerals and gases may cause black smoke to flow from a hydrothermal vent

Cold water flows from hydrothermal vents and is warmed by the surrounding water

2 and 4

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Explanation:

b

explanation:

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.