Final answer:
The correct order of the food chain is Sun > Grass > Mouse > Owl, as it correctly shows the flow of energy from the producer to higher-level consumers.
Step-by-step explanation:
When considering the correct order of the food chain, we need to remember that energy transfer within an ecosystem begins with the sun and flows through various trophic levels from producers to various levels of consumers. In this specific case, the correct order of the food chain is Sun > Grass > Mouse > Owl.
The Sun provides energy to the Grass (producer), which is consumed by the Mouse (herbivore or primary consumer), and the Owl (carnivore or higher-level consumer) preys on the Mouse. It is important to note that the arrows in a food chain point from the organism being eaten to the organism that eats it, indicating the direction of energy flow.