A.human adaptability.
B.human evolution.
C.cultural differences.
D.inter-group inequalities.
A.Farmers.
B.Workers.
C.Settlers.
D.Colonizers.
A.loose
B.indefinite
C.causal
D.remote
A.depending on shared conventions.
B.fashioning their own conventions.
C.adjusting their personal feelings.
D.elaborating a common language.