Which of these is a valid way to import a module in Python?

The valid way to import a module in Python is through the statement "import math". This is the correct syntax that allows you to bring in the functionality of the math module, which is a standard module in Python that provides various mathematical operations. By using "import math", you can then access the functions and constants defined within the math module using the syntax math.function_name().

The other choices do not follow Python's syntax for importing modules. "include math," "require math," and "using math" are not recognized by Python as valid import statements and hence would raise an error if executed. Thus, understanding the correct syntax is crucial for utilizing modules effectively in Python programming.