Answer:
Abby's realization is an <u>example of being observant</u>
Explanation:
In every people out there, there are two major classification:- observant people and non-observant people. The observant people are those aware of there environment and tends to pick up details that ordinarly people would not be able to see.
In the case of Abby's, her ability to notice that her heart beat rate is the cause of the puppy to sleep shows that her relization is an example of an observant person.
I personally think that the answer would be C