How do you import modules from your own device.py file?

The correct choice involves using the syntax that is commonly employed in Python to import specific classes or functions from a module. When you are looking to import specific items from a module, using the 'from' keyword followed by the module name and the names of the items you want to import is the standard practice in Python.

In this case, utilizing the statement that specifies 'from device import Router, Switch' allows you to directly access the Router and Switch classes from the device.py file without needing to refer to the module name every time you use these classes. This facilitates cleaner and more concise code, especially when you are using these classes frequently throughout your script.

The other choices do not conform to standard Python import syntax. Using the first choice suggests a syntax that does not provide any functional difference (importing the whole module without specific utility), while the remaining options use terms that are not recognized by Python's import system, such as 'include' and 'require', which are not valid keywords for importing modules in Python.