Sergei has an affinity for outdoor activities. What does this MOST likely mean?

Question 6 options:

He has allergies that are affected by the weather.

He hates to workout outside and prefers to go to the gym.

He prefers to hike in the woods rather than walk on a treadmill.

He is most effective when he does online workouts in his house. 

He prefers to hike in the woods rather than walk on a treadmill.