Question

4.3.6 quiz: sustainable societal development the graph shows the percentages of different types of lightbulbs shipped to consumers in north america over three years. percentages of lightbulbs sold annually to residents in north america, by type 2015 2014 2013 0% 10% 20% 30% 40% 50% 60% 70% halogen incandescent compact fluorescent (cfl) light - emitting diode (led) fluorescent the demand for which kind of lightbulb has decreased during this time period? a. incandescent b. halogen c. led d. cfl

Explanation:

To determine which lightbulb demand decreased, analyze the graph's trends. Incandescent's line (red) shows a downward trend from 2013 to 2015. Halogen (orange) increases, LED (blue) increases, and CFL (dark blue) increases. So Incandescent demand decreased.

Answer:

A. Incandescent