print("A lighting flash:\nbetween the forest trees\nI have seen water.")
Explanation:
The question requires us to print a single sentence in three different lines. To do so, we can use the escape sequence "\n" to create a new line. So, we just need to include an escape sequence "\n" after "....flash:" and also after "...trees" in the print function, the entire sentence will be printed in three lines as required by the question: