Answer:
Naturalistic observation
Step-by-step explanation:
While doing a study if a subject is observed in their natural environment it is known as a naturalistic observation. The observer has no influence over the behavior of the subject.
A analog observation is an observation of a subject in an artificial environment.
Here, the doctor is studying the ways that mothers and their toddlers interact throughout the day. The doctor has no influence over the behavior of the toddler and the mother. Hence, she is observed in a naturalistic observation.