How is a variable defined in Python?

Answer: Option C

In Python, a variable is defined by using the syntax x = 10.
To define a variable in Python, you simply write the variable name followed by an equal sign (=) and then the value you want to assign to that variable. This process binds the variable name to the specified value. Unlike some other programming languages, Python does not require explicit declaration of variable types. Instead, variables are dynamically typed based on the value assigned to them.