I believe it was called Feudalism :) I hope this helps!
Answer:
Hey there!
Vegetation would include Pine Trees, Shrubs, Mosses, and Fir Trees.
Let me know if this helps :)
The correct answer is interference
Explanation: The superposition, also called interference in some cases, is the phenomenon that occurs when two or more waves meet, generating a resulting wave equal to the algebraic sum of the disturbances of each wave.
