The answer is Method
A method is a code block of statements that perform a task.
By calling a method, a program causes statements to be executed. In C#
programming, every instruction that is executed is performed in the context of
a method. Technically, it is how behaviors are implemented in C# and are
enclosed in parentheses separated by commas
It’s a piece of hardware (you can touch it) that changes something on the screen. Examples are a keyboard putting letters on the screen or a mouse moving the cursor