Answer:
a. the positive side of stress which is healthy and normal
Step-by-step explanation:
Eustress is a type of stress that can help a person. For example, many people feel some stress before a job interview; this stress pushes the person to prepare and do better. This amount of stress is not necessarily unhealthy. Additionally, things like rollercoasters or horror movies induce stress but are still not too much stress for a person to manage. Either, the point of eustress is to have a positive effect instead of causing a lot of anxiety for a person.