Answer:
A characteristic of the Woodland and Mississippian cultures was the earthen mounds.
Explanation:
The Woodland and Mississippian cultures were the most advanced cultures in what is now the USA. They had well-developed civilizations in comparison to the people groups in their surroundings. Their trademark though was the construction of earthen mounds that are found all over the territories in which the two cultures existed.
The earthen mounds, as the name suggests, are mounds made out of the ground. They vary in size, from just a few meters to hundreds of meters. Their shapes too vary, with some being in a semi-circular shape, some like bulges, while some even like snakes. The purpose of these mounds is still a theme of hot debate, but it is most commonly thought that they had religious purposes.
The Senegal River has a length of about 675 miles and serves as part of the border between Mauritania and Senegal, before finally draining into the Atlantic Ocean. The headwaters of the river come from two rivers that originate in Guinea, namely the Bafing and Semefé (Bakoye) rivers.
There is lot of differences between the urban parts of Egypt and the rural parts of Egypt, anything form climate, economy, lifestyle, architecture, vegetation... The most significant difference, that is most commonly referred, is the economic difference. People in the urban areas (Cairo, Alexandria, Giza) have bigger incomes and much more opportunities for work and better wage. On the other hand, people from the rural areas are restricted to agriculture, they are totally dependent on it, and when there's economic disturbance they are always the ones the suffer the most.
Australia is smallest, Eurasia biggest, Madagascar largest island