SECTION 4
　Being outside has a great effect/on your body,/both physically and mentally. According to some studies,/exposure to sunlight increases the release of serotonin,/a chemical produced/in the brain. It’s associated with lifting your mood. Since it also helps a person feel calm and happy,/it’s called “the happy hormone.” Without enough exposure to sunlight,/your serotonin level can decrease. A lack of serotonin causes chronic fatigue,/loss of motivation and sleeplessness.
　There are other ways/to produce serotonin/besides sunlight. One is by exercising. Another is by chatting with your family or friends. Picnics have all of them!