Central and south america — list and describe a specific example of an ocean or river and how it was a barrier and/or roadway.

(brainliest goes to best answer)

The Amazon River in South America served as a significant roadway through the centuries. For instance, the river allowed Orellana, a Spanish explorer in the 1500s, to spread Christianity to Amazon inhabitants. Explorers were able to travel up the entire river and return by the same route, which emphasizes the practicality of it as a travel method. Additionally, naturalists on these expeditions spread ideas through their findings on the Amazon. In conclusion, the Amazon River provided an effective path that encouraged the spread of global knowledge and beliefs.

Answer(a); // soil salinization and waterlogging;

D. a mountain abd are made by volcanos and tectonic plates