Explanation:

var is used to declare variables.

• function is used to declare functions.

Both are declaration statements because they define variables and functions before execution.

Example:

var x = 10;  // Variable declaration

function greet() {  // Function declaration

    console.log("Hello!");

}

Why Not Other Options?

• (A) Prototypes → Incorrect. Prototypes are used in object-oriented JavaScript but var and function are not prototypes.
• (B) Data types → Incorrect. var and function are not data types like string, number, etc.
• (C) Keywords → Partially correct, but they are mainly declaration statements, not just reserved words.