Answer:
the increased knowledge and expansion of agriculture
Step-by-step explanation:
What led to the increased size of American Indian settlements in Georgia during the early Woodland period was "the increased knowledge and expansion of agriculture."
This is evident in the fact that the American Indians during the woodland period (1000 BC to 1000 AD) were initially hunters and gatherers. However, they later learn farming crops like corn, beans, and squash to sustain themselves, and in turn, they were able to settle and grow in population.