In our lab meeting this week we read about Sak's (2020) study, which looked at the themes underlying students' most difficult questions and the types of answers their teachers gave. Overall, they found that most of teachers' responses were not realistic or sufficient, suggesting that their responses were not conducive to children's learning.
Sak, R. (2020). Preschoolers' Difficult Questions and Their Teachers' Responses. Early Childhood Education Journal, 48(1), 59-70.