（1）Hiking is not only a healthy but also

activity.
（2）The reason why people go hiking is

from person to person.
（3）First，hiking is very good exercise to improve people's

.
（4）Hiking is good exercise that doesn't

your body.
（5）Second，hiking is simple and

.
（6）Finally，hiking helps clear your mind so that you can return to

with confidence（信心）.