They offered Natural resources which include agricultural land, coal, furs, forestry (timber), and iron ore. They exported iron ore as a raw material and as manufactured goods such as tools, plows, nails and kitchen items such as kettles.
It was '<span>military defeats, rebellions, and economic troubles' that </span>indicated that the Tang Dynasty had lost the Mandate of Heaven.
The mandate Heavens was the believes in China that the Heaven gave kings the policy to rule according to their wisdom and knowledge.
They heard a shot come from an unknown area, and were afraid it was coming towards them.
The answer is a. townshend program