Read this excerpt from a passage and the works cited entry for the source listed below the excerpt.     "Bill Richardson, a rancher that lives in the area that has been affected by the frequent earthquakes does not believe that they are a result of man-made causes. 'The thing is,' he states, 'oil and gas production are a big part of our economy, and I believe we are under attack by people who want to change that. So they made up this story about oil and gas drilling and fracking being the main cause of these earthquakes.'"     Richardson, Bill. Personal interview. 5 Sep. 2016. Is this source credible or not credible, and why or why not? This person is not a credible source because he has not experienced an earthquake. This person is a credible source because he provides eyewitness testimony and has experienced the subject in question. This person is not a credible source because he is not an expert in the subject and expresses an unfounded opinion. The person is a credible source because he has a valid viewpoint that should be included in the passage.

Human Activity and EarthquakesWhen Americans think of earthquakes, they tend to think of California, a state known for its frequent seismic activity. In recent years, however, people in Arkansas, Colorado, Kansas, New Mexico, Oklahoma, and Texas have been feeling the ground shake more often. An increase in oil and gas drilling in these states has led to "human-induced" earthquakes—those resulting from human activity. When wastewater is disposed of during gas and oil drilling, the water is forced deep underground. The resulting buildup of pressure can cause fault lines (cracks in the Earth's crust) to shift. According to Mark Petersen, head of the U.S. Geological Survey's earthquake hazard mapping project, "In the past five years, the USGS has documented high shaking and damage in areas of these six states, mostly from induced earthquakes."What is the main, or central, idea of the passage?

What cause earthquakes?

(Q019) The Deepwater Horizon disaster wasGroup of answer choicesa swarm of earthquakes in Oklahoma due to "fracking."a catastrophic blowout that occurred in April 2010 in the Gulf of Mexico.the meltdown of a nuclear reactor in Japan.the spill of more than 2 million barrels of oil from an oil tanker off the Alaskan coast.

is the science that analyzes the cause of earthquakes and the propagation of waves within Earth and on its surface.

True or false: Pumping liquids underground has been known to trigger earthquakes.