In which way has the agriculture industry shifted?

from a small number of workers to many workers
from many small farms to fewer large farms
from growing animals to growing plants
from harvesting natural resources to harvesting plants

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov

try only asking one question