Answer:
Collection of the Data
Explanation:
A scientific method is a systematic approach to understand and explain the natural event of phenomena occurring in the environment.
The scientific method begins with making an observation, doing background research, framing a scientific question, forming a predicted hypothesis, performing an experiment to test the hypothesis, collection of the data, analysis of the data, conclusion and the communication of the results.
In the given question, the recording or measuring the amount of fat in the bats is the "Collection of the Data" which is performed during the experiment to test the hypothesis.
Thus, Collection of the Data is the correct answer.