what do the arrows in the food chain indicate about the flow of energy in an ecosystem

a
The arrows represent the flow of energy in one direction from producers to consumers.
b
The arrows point in the opposite direction of the flow of carbohydrates, like glucose.
c
The arrows flow of energy show most of the energy goes to the highest level consumer.
d
The arrows show the flow of energy and why there are many more raccoons than grass plants in the ecosystem.

a) The arrows represent the flow of energy in one direction from producers to consumers.