Answer: B) Reduplication
Explanation for this question is being written.
Answer: C) Reduplication
Answer: A) Formed by reduplication / onomatopoeia.
Answer: A) Reduplication
Answer: A) Repeating a word.
Answer: A) Dada for daddy, bibi for baby /bebi/.
Answer: A) Reduplicatives
Answer: D) Mama
Answer: A) Running
Answer: D) Reduplication babbling.
Answer: C) Repeating a morpheme, like "do you like-like him?".