Answer:This is a case study
Step-by-step explanation:
A case study is used to study in depth and closely the subject .
It also examines the subject into details just to see if there are real life links to the suggested theory or to taste a hypothesis.
The subject may be a small group of people or it .ay be an individual person.
In this case an individual is this girl who was trapped for 13 years , she will be closed examined and studied .
They will look closely to see how she will learn words or putting them together after she has been locked away for years and has not been able to use any words to speak.