Pay attention to the alliteration in the following sentence.
Input: Towers of tall trees towered over the teenage tourists.
Yes, the sentence contains alliteration - the repetition of beginning consonant sounds in a sequence of words. The sentence has a poetic quality to it due to the repetition of "t" sounds. The sentence also emphasizes the tallness of the trees through the repeated use of "tall".
The repetition of 't' and 't' sounds in the sentence creates a kind of poetic sound. The sentence has a pleasant melody that is pleasing to the ear.