You tell them to move
Stop dividing.
yes, they stop growing. This property of them is called CONTACT INHIBITATION. Cancer cells lose this property.
because when cells come in contact with each other the cells stop growing
The same way you stop touching anything else. make no physical contact.
inform them
stop eating then you wont have fat legs then you hungry cows!
If you eat a lot and stop exercising, yes.
No
I don't think so at all.
Stop, drop and roll
Travel compression socks are used for various different things including air flight travel, they pressurise a persons legs to stop massive blood pressure change during high altitude.
Yes.