According to thomas and chess, a child that is very irregular in sleeping and eating, resists change, and tends to be loud is labeled a(n) child. easy difficult negative slow-to-warm-up

I believe the answer is: Difficult child

According to thomas and chess, the difficult behaviors that displayed by children are mostly resulted from the level of temperament that they have. The temperament is influenced by biological factors, and difficult children tend to had the highest temperament among other children.

The answer should be a.