This code performs the following steps: 1. **my_list = [1, 2,...

This code performs the following steps:

1. my_list = [1, 2, 3]: Creates a list named my_list with the elements 1, 2, and 3.

2. my_list.append([4, 5]): Uses the append() method to add a new element to the end of the list. The argument provided to append is another list, [4, 5]. This results in the entire list [4, 5] being added as a single element within my_list.

3. print(my_list): Prints the content of my_list to the console.

Final Output:

The output will be:

[1, 2, 3, [4, 5]]

The list now contains four elements: 1, 2, 3, and the nested list [4, 5].