Explanation:

- Twiddling one’s thumbs: This idiom typically means idling or wasting time when there isn't much to do. It's often associated with feeling bored, as people might twiddle their thumbs when they have nothing else to occupy themselves with.

- Option 1: Feeling sad - Twiddling one’s thumbs doesn’t relate to sadness. Feeling sad is not about being inactive or having nothing to do.

- Option 2: Feeling hungry - Hunger involves a physical need for food, not an emotional or idle activity. Twiddling one's thumbs doesn't relate to hunger.

- Option 3: Feeling bored - This is the correct meaning. When someone is twiddling their thumbs, they're often idle and have nothing to do, leading to boredom.

- Option 4: Feeling bored - It seems there is a duplicate option here, but it confirms that boredom is the correct interpretation.

Correct Answer: Option 3 - Feeling bored