Answer:
Indirectly.
Step-by-step explanation:
Stress can be defined as the emotions of strain and pressure. As per the studies, some stress is beneficial but some are not. Stress for a prolonged period affects our body and mind as well leading to several ailments and sickness. Stress has a direct and indirect effect on our health and body.
To cope with stress some people start to consume alcohol or smoking which is an indirect effect of stress on the body.
In the given case, Anna's body is being affected indirectly because of her exam stress. It is because she has begun to consume one bottle of wine every night thinking that it will help her to reduce her stress, but on the contrary, she might develop an addiction to alcohol.
So, the correct answer is indirect.