A sandblasted rock could be different in color because sandblasting takes the top layer of the rock (which has been weathered) off.
Explanation:
The life of man was a little easy than the stone age in agriculture age. It helped the people to live on , society,group.The people knew about the eatable or consumable grains and beans in the age.People cultivated many crops and had farms in that time.The knowledge also allowed them to stay at a particular place.And now they depend on it and didn't need to depend on animals of the forest.They could store the grains,fruits ,etc and use them for future, too.
