Direct materials inventories are kept in pounds in Concord Company, and the total pounds of direct materials needed for production is 9300. Of the beginning inventory is 1100 pounds and the desired ending inventory is 2200 pounds, the total pounds to be purchased are

I believe the answer is: C.Producers convert light energy into chemical energy

As organisms move up higher on the trophic level, they would become much more dependant toward consuming other organism to obtain their energy.
Producers who placed the lowest on the trophic level could produce energy without consuming other organism due to photosynthetic ability.