Final answer:
The question asks about the longest period of drought in Jamestown from 1580 to 1640, which requires historical climate data, possibly from dendrochronology, to determine.
Step-by-step explanation:
The question concerns a historical event related to Jamestown, the first permanent English colony in America, which was established in 1607. Specifically, it asks about the longest unbroken period of drought that occurred in the region between the years 1580 to 1640. To identify this period, one would typically consult historical climate records or data derived from tree-ring studies, known as dendrochronology, which can provide precise information about past rainfall patterns. With this data, we can examine the specific years within that range to determine the period with the least amount of rainfall, indicating a drought. These data can shed light on the environmental challenges faced by the early settlers of Jamestown, which included periods of severe drought that affected the colony's food production and overall sustainability.