Answer:
Selective attention
Step-by-step explanation:
Selective attention is the process in which one is able to concentrate on important things and able to ignore unimportant happenings. This process helps in the untuning of distractive details.
In the given case, Alisha is able to concentrate on what her teacher is saying even in a disturbing environment because of selective attention.
Selective attention works in an environment when there are so many things going on around but we have to be picky in all those bustle to be able to give attention to what is most important at that moment. In this process, our sensory motors become selective to the details that are important.