Answer: Students prefer salty snacks over sweet because the percentage of sweet snacks were lower than the percentage of salty snacks
Most people call her a level-headed student. That would be the correct answer, because level-headed is always hyphenated.
Answer:
The focus on the word swarming has allowed the comparison with the bees. We say bees swarm but we do not say that a person swarms - in this way you can make a metaphor.
The comparison in personification on the other hand can be remembered by the word found in the first six letters -person