1.What are the dairy products that you like?
→I like milk,cheese and yogert

CORRECT: I like milk, cheese and yogurt.

>>Be mindful of the correct spelling of a word. A space is placed between a punctuation mark and a word.

2.What is the dairy product that you don't like?
→I don't like butter.

CORRECT: I don't like butter.

>>A period is placed at the end of a sentence.

3.How about your father(dad)? What are the dairy products that he like?
→my dad like a milk

CORRECT: My dad likes milk.

>>'milk' is an uncountable noun so an article is unnecessary. Singular
subjects take singular verb. When starting a sentence, the first letter of the
beginning word should always be in capital.

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Thank you for passing your homework, Jenny! There are few corrections in
your sentences. Kindly read and study them. You are very attentive! Keep it
up! I'll see you in class, Jenny! ~

- T.Mary