They are electromagnetic waves because mechanical waves have to be physically created by something, while electromagnetic waves are just emitted without any effort or force.
Answer:
The Shinumo Quartzite also known as the Shinumo Sandstone, is a Mesoproterozoic rock ... The Hakatai Shale, Shinumo Quartzite, and Dox Formation are intruded by these ... activity and fluid migration during the deposition of the Shinumo Quartzite. These deformed beds can be seen at river level in the vicinity of Nevilles ...
Explanation:
The Amazon River is found in South America
I believe C is the correct answer; parent material is rich in nutrients for plants, and decomposed plant litter is also known as decaying organic material. Hope this helps! :)