Energy is lost as you go up the trophic levels. Therefore the trophic level with the least amount of energy is the secondary consumers.
Note: I'm not sure where decomposers fall in the food chain. I did not say decomposers as they are and can be present in any trophic level.
#4 i believe is Atmosphere. Geosphere is actually all the land of the earth
#5 is Lithosphere
#6 is Geosphere
