Egbert is a quiet child who is very slow to adapt to change. however, if he is introduced gradually to new people or situations, then eventually he will accept them without too much distress.
thomas and chess would say his temperament is

a) active
b) slow-to-warm-up
c) difficult
d) eas

Thomas and Chess would say his temperament is B. slow-to-warm-up.

Explanation:

When a child has slow-to-warm-up temperament, it is understood that he/she is cautions and often nervous about new situations where he/she does not feel comfortable. He/she needs to be able to trust someone, for example.

In this case, we can see Egbert is quiet and it is not easy for him to adapt to change. By the name, it can be deduced that a gradual introduction to others will help him be less distressed and be able to accept new situations and people.

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