Sharecroppers worked on farms and they were provided the farm by a man. The man would take 1/2 the crops and they must sell the other 1/2 to pay rent and other needs. Yeah paying rent even though they give 1/2 the crops. Awfull isnt it? Just like slavery your stuck in an endless work cycle.
He made the covenant with Abraham
It could be a variety of answers some examples could be something relating to the technology, or the advancements of this time period. Anything relating to that would be fine!
Many of our scientific ideas come from Ancient Greece :)
It would affect work and factories because id the workers may need food they would not have any