ONE specific example about the relationship between government and public works during the 13th century that could have led the author to conclude that those who built the Grand Canal deserve more credit than those who built the Great Wall.

the answer would be choice c, cave paintings.

monitor contract compliance and results of forestry activities to assure adherence to government regulations.  

plan and supervise forestry projects, such as determining the type, number and placement of trees to be planted, managing tree nurseries, thinning forest and monitoring growth of new seedlings.  

establish short- and long-term plans for management of forest lands and forest resources.  

determine methods of cutting and removing timber with minimum waste and environmental damage.  

supervise activities of other forestry workers.

by the way there is no video here.

i think you may have asked this twice, but i answered one of the