Final answer:
The code snippet is true; it checks the turtle's current pen size and sets it to 4 if it is less than 4 using the turtle module functions in Python.
Step-by-step explanation:
The statement "The following code snippet will change the turtle's pen size to 4 if it is presently less than 4: if turtle.pensize() < 4: turtle.pensize(4)" is True. In the Python programming language, this snippet uses the turtle module, which is a popular way to introduce programming concepts. The code checks the current pen size using the turtle.pensize() function. If the result is less than 4, the code inside the if-block is executed, which sets the turtle's pen size to 4 using the turtle.pensize(4) method. Therefore, if the pen size was originally less than 4, it will indeed be set to 4 after this code runs.