Answer :
Answer: This is an example of SUSTAINED ATTENTION.
Explanation: Sustained attention can be defined as the quality of being able to focus on a action or stimulus over a long period of time irresponsible of other distractions and disturbing actions happening around. This is a Cognitive skill and it helps us to perform well in our daily activities to carry out task that take a long period of time to complete.
Watching over the breath of her baby for change is Sustained attention as this kind of activity takes a very long period.