When stones were unavailable, which material did laborers use to build a strong barrier to withstand attack?

Responses

compressed dirt

compressed dirt

wooden boards

wooden boards

bricks

bricks

cement

compressed dirt

When stones were unavailable, laborers used wooden boards to build a strong barrier to withstand attack.

When stones were unavailable, laborers would often use wooden boards as a substitute material to build a strong barrier that could withstand attacks. To arrive at this answer, one could consider historical knowledge or research various construction techniques used in the absence of stone.