It isn't certain, but since the strap was usually made of goat-skin, it could have been a symbol of fertility. By striking the women (often on the wrists) with it, it was said to ensure fertility, easy childbirth, and good health for them.
-Visible
-In sight
-Viewable
-Evident
-Detected
-conspicuous- obvious/easily see
U should of put this in science u put this in English :0