The correct answer is A) cataracts.
Nubians did not use the Nile for trade because of the cataracts.
The Nile River in North Africa is a navigable river in some parts of the Nile. However, on the part that crosses Nubia, there was a cataract that impeded navigation for the Nubians. Today, that cataract is part of the Nasser Lake. In that region of Nubia and Egypt, there is another cataract that is located in Aswan, Egypt.
Probably, you do not know that the Nile River has six cataracts along the river. One is Egypt (Aswan) and the other five are in Sudan (today, Nubia is part of Sudan).
Answer:
gathering food instead of cultivating the land for crops
Explanation:
Among the following options that would be least likely to damage an ecosystem is "gathering food instead of cultivating the land for crops."
The gathering of food instead of cultivating the land for crops will not or hardly affect the ecosystem because there is the uprooting of forests or bushes and soils, which are the natural habitats of plants and animals in the ecosystem.
However, founding a new city and building houses there; building a dam to generate electricity; and raising a type of livestock in a region where it is not native will all involve the excavation of soils and clearing of bushes which are natural habitats of plants and animals, thereby affecting the ecosystem.
<span>1. They sought to reach
an agreement to amend the limitations that prevented a satisfactory
trade between the states, in order to achieve it, they had to change the
Articles of Confederation. 2. The affected states should
meet to eliminate existing trade depression, lack of regulation of
interstate commerce, possession and collection of import duties and
export, use of rivers as a means of transportation. <span>3.
It was sought to review the Articles of Confederation to find political
union and to have a central, very competent government, that had the
capacity to resolve the disagreements between the States.</span></span>
C. Samuel Adams
I am 100% sure about this one. I studied this in AP U.S. History
