What did people learn to do with seeds way back in time?

People learned how to plant their own seeds to produce food. They no longer had to follow animal herds and were able to settle in one spot for an extended period of time.

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the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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your answer would be (a)