Her speech was so _______ that the entire audience sat in silence, deeply moved by her words.
The clue is "the entire audience sat in silence, deeply moved," indicating the speech had a strong impact.
- "Powerful" means having great effect or influence, which fits well.
- "Persuasive" means convincing, but it doesn't necessarily cause silence and deep emotion.
- "Dramatic" relates to theatrics, not necessarily deep emotion.
- "Emotional" is close, but "powerful" better captures the overall effect. Hence, "powerful" best completes the sentence.
Answer: \(\boxed{\text{powerful}}\)
Despite his repeated failures, he remained __________ and continued working towards his goals.
The scientist was awarded ______ for her contribution to renewable energy research.
If the train is delayed, we will have to _________ our travel plans accordingly.