How are climatographs in understanding biomes?

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky

The position on the earth in which a place can be found

The graph shows the number of employed workers in the united states in nonfarm jobs from 2008 to 2013. the best conclusion that can be drawn from the graph is that the number of nonfarm jobs remained consistent over time. started going down in 2008. went up every year since 2008. started going down in 2010.