Solution:
Hints in the given sentence (not deciding what is right and what is wrong and cutting the branch he is sitting on) indicate that Alex is foolish. Hence, option 3 is correct.
Alex cannot decide what is correct and what is wrong. Once he sat on a branch of tree and cut the same branch and fell from there.
Which of the following statements is most appropriate to describe Alex?
Hints in the given sentence (not deciding what is right and what is wrong and cutting the branch he is sitting on) indicate that Alex is foolish. Hence, option 3 is correct.