Questions: Kai is experiencing flow. They are MOST likely: not being challenged. relaxing and watching television. absorbed in tasks that challenge but don't overwhelm them. getting external rewards for working hard.

The answer is: absorbed in tasks that challenge but don't overwhelm them.

Explanation for each option:

1. Not being challenged: This option is incorrect. Flow is a state of deep immersion and engagement in an activity, which typically occurs when a person is faced with a task that is challenging yet manageable. If someone is not being challenged, they are unlikely to experience flow.

2. Relaxing and watching television: This option is incorrect. Watching television is generally a passive activity that does not require active engagement or challenge, which are key components of experiencing flow.

3. Absorbed in tasks that challenge but don't overwhelm them: This option is correct. Flow is most likely to occur when a person is engaged in an activity that is challenging enough to require their full attention and skills, but not so difficult that it becomes overwhelming. This balance allows for deep concentration and enjoyment.

4. Getting external rewards for working hard: This option is incorrect. Flow is an intrinsically rewarding experience, meaning that the enjoyment and satisfaction come from the activity itself, not from external rewards. External rewards can sometimes disrupt the flow state by shifting focus away from the activity.