They are caused by human influences and natural ecological processes
<span>Faunal succession recognized in the sequence of fossils in stratified sedimentary rocks was a key concept that led to the concept of evolution of life on Earth</span>. T<span>his principle is from Willian Smith, an English geologist. It used to determine the age of the rocks and strata.</span>
The author believes that the law of the heart is stronger. The boy learns this throughout the book. The heart is what makes the boy go back to his pack and save his own life.
Uruguay because the Andes is in the west of South America therefore eliminating b, c, and d
