Answer:
The correct answer will be option-D.
Explanation:
Indirect observation is an observational technique where the experimenter person does not record the data directly but use the past data recorded by another person in videos, books, documents and other sources.
In the given question, to observe the behavior of nesting owls, the experimenter is using the means of live video instead of directly observing to record the data.
Thus, option-D is the correct answer.
