Final answer:
Relations between the settlers of Roanoke and Jamestown and the Native Americans were initially marked by diplomacy and trade but soon devolved into hostility, leading to violent conflicts mainly due to English aggression, land occupation, and the spread of diseases.
Step-by-step explanation:
The settlers at Roanoke and Jamestown had complex and evolving relationships with the Native Americans. Initially, at Roanoke, there were attempts at diplomacy and the reception of the English was fairly positive. However, relations deteriorated after incidents such as the theft of a silver cup by the natives, leading the English to burn down a village. This act contributed to future hostility and a continuous downward spiral in relations. At Jamestown, the situation was similarly strained. The Powhatan Confederacy initially resisted the English colonists, and though there were periods of trade and seemingly peaceful coexistence, tensions ultimately led to violent conflicts. English imposition, occupation of land, and diseases further exacerbated animosity, culminating in several wars between the settlers and various Native American tribes.