The correct answer is: emphasized.
The old father emphasized the moral of unity by asking each of his sons to break the bundle of sticks. This is because when the sticks are together, they are strong and cannot be broken. However, when they are separated, they are weak and can be easily broken. This is a metaphor for the importance of unity. When people are united, they are strong and can overcome any challenge. However, when they are divided, they are weak and can easily be defeated.
The other options are incorrect because they do not accurately describe what the old father did.
- Voiced means to express something in words. The old father did not simply voice the moral of unity; he demonstrated it by asking each of his sons to break the bundle of sticks.
- Declared means to state something formally or officially. The old father did not declare the moral of unity; he demonstrated it by asking each of his sons to break the bundle of sticks.
- Suggested means to offer something as a possibility. The old father did not suggest the moral of unity; he demonstrated it by asking each of his sons to break the bundle of sticks.