Any activity that gets you off the sofa and into the great outdoors is healthy I say! There are ways to prepare for trekking to make sure that it is safe, but i would say it is definitely healthy.
Develop a new healthy habit
No, it is not a healthy behavior to get in the habit of doing.
Yes! My healthy habit is having a balanced meal everyday.
A good habit of eating a healthy breakfast can benefit you, whereas, a smoking habit will not benefit you at all.
Yes.
The word trekking would be used like: "I am trekking around the world." "They went trekking." "Suzie is trekking to Istanbul." "Trekking is quite fun."
Trekking is walking Holidays.
A trekking horse is any horse that is used for Trekking (Trail riding).
environment, personal choice, and habit
Your friend is right! Eating healthy is a great habit to get into. It can have many health benefits. Below is a link that lists 5 good reasons to maintain a healthy eating habit! http://straighthealth.com/pages/five/reasonseat.html
This is not true. India has always been the first choice for trekking. You can opt for the adventure trekking in Indian Himalaya, ladakh, nubra valley, Trekking in Zanskar valley.
no it is not a good habit because there can be germs on our finger which can go in the mouth while licking the finger through the book.