The tough environment of the Virginia coast spurred Native tribes to:
A. Band together for strength
B. Move farther inland
C. Abandon hunting in favor of farming
D. Attack European settlements

A. Band together for strength

Explanation:

When the Europeans arrived in Virginia they found a powerful paramount chiefdom under the Powhatan that was essentially a very strong alliance comprising of around 30 smaller chiefdoms which between themselves essentially covered all of Virginia's coast. .

This shows that the Native tribes bound themselves together for strength probably to survive the tough Virginia coast environment that had seen them reduce hunting and face competition amongst themselves for resources.

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