It is natural, in the sense that running is something that our evolutionary background prepares us to do.
Since man began he has run. It is a natural behavior.
Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.Yes it is natural. It is not man made.
natural.
It is natural but there are man-made imitations.
natural feature
feathers are not man made they are natural
it is all natural
Coal is a natural mineral. You might be confusing this with charcoal which is man-made.
Man
Is limestone natural or man made
Man-made and Natural Resources
natural