Which of the following is an example of social facilitation?

Working to improve the working conduit a factory is an example of

If you have a green turn signal light, you must before making your turn. a. check the crosswalk b. yield to cross traffic and check the crosswalk c. turn off your car's turn signal d. none of the above

Which of the following statements is true of how pollutants can enter the environment from a sanitary landfill?