The phrase "The red fox was running rampant through the ravine" primarily features alliteration due to the repetition of the "r" sound in "red," "running," and "ravine."
Here's a breakdown of why it doesn't fit the other terms:
- Personification: This is giving human traits to non-human entities. The phrase does not attribute any human qualities to the fox.
- Hyperbole: This is an exaggerated statement not meant to be taken literally. While "running rampant" might imply a high level of activity, it's not an extreme exaggeration.
- Onomatopoeia: This involves words that imitate sounds. The phrase does not contain any sound-imitating words.
- Idiom: This is a phrase that has a figurative meaning different from its literal meaning. The phrase is straightforward and does not contain idiomatic expressions.
So, the correct answer is alliteration.