Answer:
It shows that Oliver is unnerved by his own boldness.
Step-by-step explanation:
The phrase somewhat alarmed at his own daring shows us that Oliver is unnerved by his own boldness. Oliver Twist was born into a life of poverty and misfortune, and in the given scene, he asks his master for more food, despite the fact he had already eaten. He knows that that is something he isn't supposed to do, but a child's hunger is stronger than its reason. That's why he was alarmed at his own daring.