Option 1 -> Hesitant means uncertain or reluctant, which is the opposite of intrepid.
Option 2 -> Extrovert refers to an outgoing personality type, unrelated to courage or bravery.
Option 3 -> Timid means lacking courage or confidence, which is an antonym of intrepid.
Option 4 -> Fearless means without fear or brave, which directly matches the meaning of intrepid.
Hence, Option 4: Fearless -> "Intrepid" describes someone who is fearless and adventurous in the face of danger or difficulty, making "fearless" the perfect synonym -> correct