_________ is used to indicate possession.
Use apostrophe + s ('s) for singular possession, and s + apostrophe (s') for plural possession.
An apostrophe (') is used to show possession, e.g., "Ravi's book," "the children's toys." Other marks like hyphen, semicolon, and period serve different purposes. \[ \Rightarrow \boxed{\text{Apostrophe}} \]