Which of the following would provide the most energy in an ecosystem? A. Omnivore
B. Carnivore
C. Producers
D. Herbivores

The one that would provide the most energy in an ecosystem are producers!

Explanation: On the food chain and in the  ecosystem they contain the most energy. About 90% is lost through heat and and movement of the animals. Lets say you have 10,000 kelo calories, then you have the producer and then your 3 animals, this means the last one only gets 10 kelo calories!

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.