Most of (some, many, few, two in five of, around a third of, less than a half of)

1.

Most of (some, many, few, two in five of, around a
third of, less than a half of) … teenagers (young
people) …
This fact (it)means that they/it is
It proves that they …
Eat a variety of foods
Have a healthy diet
snack a lot
Want to loose weight
Are overweight
Promote a healthy way of
life
Is harmful for health
Ruin their health
Eat fast food
take care of health
Prefer home-made food
Eat healthy food
Is useful for health
Damage their health
Are physically inactive
Skip meals