Which is a reason that the effects of assonance are often subtler than those alliteration?

The effects of assonance are often subtler than those of alliteration because assonance involves the repetition of vowel sounds, while alliteration involves the repetition of consonant sounds.

Here's why this makes a difference:

* Consonants are generally more noticeable than vowels. Consonants often create sharper, more distinct sounds, while vowels tend to be softer and less defined. This makes the repetition of consonants (alliteration) stand out more readily.

* Vowel sounds are more fluid and less defined. Because vowels are more fluid, the repetition of vowel sounds (assonance) can be more subtle and less jarring to the ear. This allows for a smoother, more lyrical effect.

In summary: Assonance uses the repetition of vowel sounds, which are less noticeable than consonants, leading to a subtler effect than alliteration.