People who developed innovative farming methods to support large urban populations.
The production of crops and farm animals for sale, usually with the use of modern technology: commercial farming methods.
France owned most of the central part of America.
A longitudinal wave particles travel parallel to the direction of energy movement
Accretion of matter from the solar nebula eventually formed the earth. The different atmospheres and ocean were probably created as a result of the volcanic outgassing that initially occurred on earth.
