The answer to this would be first come first serve
The government wasn't powerful enough. They couldn't even tax the people, so the government was too broke to offer any kind of assistance when it's country was in need. (Couldn't afford a military when they needed it, for example -- there were a lot of domestic issues that they couldn't take care of.)
The correct answer among all the other choices is C. Weathering breaks down rock and other material. This statement best describes how sediment forms. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
The US has a good water treatment system, especially because of the droughts many US states face, the reuse of treated wastewater has been a focus nowadays. Also, pollution through wastewater dischargers also has been controlled since the 1960s.
Ecuador does not have that, only 8% of all collected wastewater is treated, this means there is a lot of discharge that may pollute the environment.