Can primary sources be biased towards an event?

Civil liberties in latin america vary. this means that

Which economic sector employs the least number of people in mexico, barbados, and venezuela? a. agriculture b. services c. industry

Which of the following is a likely reason that someone today might decide to move from a city in the midwest to the south? a. the decline of manufacturing in the midwest b. the many high tech jobs available in the south c. urban overcrowding in the midwest d. higher housing costs in the south