Final answer:
In the context of the story, 'option' refers to the availability of choices, which in the case of the Hummingbird was the choice between eating fish or drinking flower nectar.
Step-by-step explanation:
In the last paragraph of the excerpt from The Heron and the Hummingbird, the word 'option' means 'choice'. When Hummingbird let Heron have all the fish in the water, it suggests that Hummingbird had lost the possibility or opportunity to eat fish, making flower nectar his primary food source. Hence, 'option' in this context refers to the availability of different choices for sustenance.