Classification – Odd one out (vowels vs consonant): Which letter does not belong with the others: A, E, I, Z?

Introduction / Context:
A quick alphabet classification: three entries are vowels in English; one is a consonant. Identify the consonant among the vowels.

Given Data / Assumptions:

• A — vowel.
• E — vowel.
• I — vowel.
• Z — consonant.

Concept / Approach:
Apply the standard English vowel set {A, E, I, O, U}. Any letter outside this set is a consonant. Among the given letters, Z alone is a consonant; the rest are vowels. Therefore, Z is the odd one out.

Step-by-Step Solution:
1) Compare each letter to the vowel set.2) Mark A/E/I → vowels; Z → consonant.3) Select Z as the single consonant.

Verification / Alternative check:
Pronunciation check confirms Z produces a consonantal sound, unlike the vowel phonemes for A/E/I.

Why Other Options Are Wrong:
They are all vowels and thus belong together.

Common Pitfalls:
None—this is a straightforward vowel-consonant test.

Final Answer:
Z