Answer:
Canada and the United States have in common is democracies
Explanation:
The source of soil is called parent material.
The energy of a person lifting a chair is mechanical energy
The construction of dams in lower reaches involves more submergence of usually cultivated land per unit of storage due to the flat nature of the topography. Advocates of small dams stress that the cost per ha of potential irrigation of tank projects is much lower than for large irrigation projects.