Answer: def add integers (x, y): return x + y

## Explanation Let's analyze each option: **Option A**: `function add_integers (x, y):` - This is incorrect because Python uses `def` keyword to define functions, not `function`. **Option B**: `def add_integers (x, y): print(x + y)` - This is incorrect because the function prints the result but doesn't return it. The requirement is to "return the sum", not just print it. **Option C**: `def add_integers (x, y): x + y` - This is incorrect because the function doesn't have a return statement. In Python, if there's no return statement, the function returns `None`. **Option D**: `def add integers (x, y): return x + y` - This is **CORRECT**. It uses the proper Python syntax: - `def` keyword to define a function - Function name `add_integers` (note: there's a space in the text, but this appears to be a typo in the question - the function name should be `add_integers` without a space) - Parameters `(x, y)` - `return` statement to return the sum `x + y` **Note**: There appears to be a typo in the question where Option D shows `def add integers` (with a space) instead of `def add_integers`. However, among the given options, Option D is the only one that has the correct structure with `def` and `return` statement. **Key Python Concepts**: 1. Functions in Python are defined using the `def` keyword 2. The `return` statement is used to return a value from a function 3. Without a return statement, a function returns `None` by default 4. Function names should follow Python naming conventions (typically snake_case)

Author: Keng Suppaseth