What method is used to add an item to the end of a list?

The method used to add an item to the end of a list in Python is append(). This method is specifically designed for this purpose and modifies the list in place by adding the specified element to the end. When you call list.append(item), the item becomes the last element of the list.

For example, consider the following code:

my_list = [1, 2, 3]

my_list.append(4)

print(my_list)  # Output: [1, 2, 3, 4]

In this case, the integer 4 is added to the end of my_list, demonstrating how the append() method effectively increases the size of the list and places the new item at the end.

Other methods mentioned serve different purposes: insert() places an item at a specified index rather than at the end, extend() adds multiple items from another iterable to the end of the list rather than a single item, and add() is not a method associated with lists in Python. Thus, append() is the correct answer as it fulfills the requirement of adding an individual item to the end of a list specifically.