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!//