Final answer:
Between 1607 and 1676, the chief source of agricultural labor in VA and MD was indentured laborers, mostly white. However, as laws against Africans in Virginia became more stringent, free Africans migrated to Maryland.
Step-by-step explanation:
Between 1607 and 1676, the chief source of agricultural labor in Virginia (VA) and Maryland (MD) was indentured laborers. In the early years, indentured servants, mostly white, dominated the Maryland workforce. However, as laws restricting the rights of Africans in Virginia increased, free Africans from Virginia migrated to Maryland. Enslavement became more common in Maryland in the early eighteenth century.