Gastrostomy tubes do not prevent people from eating by mouth.
Nor can I find any law which prevents us from eating people.
I know not what prevents me from eating you, too.
"Parental control, not legislation, is the way to prevent children from eating too much ice cream or candy."
The parents must be removed in order to prevent them from eating the eggs.
Having been captured, an animal must prevent the predator from killing and eating it.
This, of course, was to prevent moths from eating the clothes and whatever else we stored in there.
In addition, she added, shooting some deer is not going to prevent others from eating shrubs or wandering onto the road.
By the same token, I understand his religious beliefs may prevent him from eating certain types of food.
But the challenge, he said, was to prevent the animals from eating the exhibits.