I think D all of the above
Answer:
Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too. Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground.
Explanation:
Congress could raise money only by asking the states for funds, borrowing from foreign governments, or selling western lands. In addition, Congress could not draft soldiers or regulate trade. There was no provision for national courts. ... The Articles of Confederation created a very weak central government.
The royal road built in Persia during the Achaemenid dynasty proves to be the greatest achievement in improving the civilization of Persia.
Explanation
The royal road led from Aegan sea to Iran and it is around thousand five hundred miles. This road was built when the area was uninhabited by the people. But as soon as it was laid, many cities sprang up like Susa and Sardia. The roads from Susa to Persopolis which connected to India. Thees roads also interconnected canals from Nile to Red sea.
From the historic records, it was found that human porters can move up to ten to fifteen kilometers per day carrying loads of sixty to hundred kilograms.
