I think it's D. The use of farming to feed a larger population.
Answer:
Adobe is mud and straw mixed together and dried to make a strong brick-like material. Pueblo peoples stacked these bricks to make the walls of the house. Gaps between the bricks were filled with more mud to block the wind, rain, and to keep out bugs and other unwanted pests.
Otto I became powerful <span>by appointing supportive bishops.</span>
<span>Benjamin Franklin was one of the first person who encouraged cooperation among the British-American colonies.
He played the two most important roles - first as a Philadelphia delegate to the continental congress, where he trained younger persons like John Adams
After this, the second most important role was his diplomacy in France.</span><span />
Pyramids were built as tombs for the pharaohs and their queens.
