Answer: Non-reactive child
Step-by-step explanation:
Non-reactive child is the child that has the behavior of give low or no response in any particular situation. They do not react much on events as they are stable-minded and do not get frustrated or furious easily.
According to the situation mentioned in the question, Melanie can be classified as non-reactive child as she was not highly worrying infant .She was confident and curious toddler.
This describes she does not have bothering behavior rather persist inert and outgoing nature.Thus, it can be expected that she might become a non reactive-natured child