Energy in an ecosystem flows directly from a. producers to tertiary consumers b. producers to secondary consumers c. tertiary consumers to secondary consumers d. secondary consumers to tertiary consumers

The answer is b. Energy from the producers is directly moved into the secondary consumers. Only 10% of energy passes from each level so, the secondary consumers would get the most energy from the consumers. The tertiary consumers would never be able to get the energy from the producers since, the secondary consumers took the energy. The tertiary consumers get the most energy from the secondary consumers since, they eat them. The order of a food chain goes like this:
Decomposers, producers, secondary consumers, and tertiary consumers

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