Question 3.2: Write a Python function named "reverse_string" that takes a string as input and returns the reverse of the input string.

Sure, here's a Python function named "reverse_string" that takes a string as input and returns the reverse of the input string:

def reverse_string(s):
    # Use slicing to reverse the string
    return s[::-1]

This function takes a string `s` as input and returns the reverse of the string using slicing. The `[::-1]` notation is a slice that starts at the end of the string and ends at the beginning of the string, with a step of -1 (i.e., it goes backwards). This effectively reverses the string.

Here's an example of how to use the function:

s = "hello world"
reversed_s = reverse_string(s)
print(reversed_s)  # prints "dlrow olleh"

In this example, we pass the string "hello world" to the `reverse_string` function and assign the result to the variable `reversed_s`. We then print `reversed_s`, which should be the reverse of the input string.