The missing character is U.
The other three letters, O, W, and S, are all vowels. Vowels are letters that make a sound when you say them. The other letters in the alphabet are consonants. Consonants are letters that make a sound when you say them, but they also need a vowel to make a complete word.
For example, the word “cat” has three letters: c, a, and t. The letter “c” is a consonant, the letter “a” is a vowel, and the letter “t” is a consonant. The word “cat” is a complete word because it has a vowel.
The word “cot” also has three letters: c, o, and t. The letter “c” is a consonant, the letter “o” is a vowel, and the letter “t” is a consonant. The word “cot” is a complete word because it has a vowel.
The word “cut” also has three letters: c, u, and t. The letter “c” is a consonant, the letter “u” is a vowel, and the letter “t” is a consonant. The word “cut” is a complete word because it has a vowel.
The word “cot” and the word “cut” are both complete words because they have a vowel. However, the word “cut” is missing the letter “u”. The letter “u” is a vowel, and it is the only vowel that is missing from the word “cut”. Therefore, the missing character is U.