What is encapsulation in Object$-$oriented programming $($Java$)?$

The wrapping up of data and functions into a single unit called class.

The concept that prevents external access to certain classes or objects' features.

A feature that allows native code $($C$-$code, for example$)$ to be used in Java programs.

The mechanism by which we can have many methods called the same thing as long as the list of

parameters $($their types, number, or both$)$ are different.