Probably search for countries level of development and compare them then explain in the paragraph.
Contacts between sedentary and nomad peoples<span> resulted in trade, tribute payments</span>
Answer: True.
Explanation: Science class in 7th grade.
An appositive is a phrase or a word that renames a noun right beside it. Among the choices listed, the best answer is option C. <span>One cause of erosion, wind, can create alterations in the surface layers of rock. Erosion here renames wind.</span>
You didn’t give any options but i’m assuming it’s “oxygen”
