Question

so are you.
i could never be as brave as she is. it was true. one week my cousin was whooshing down a hundred - foot water slide, and the next week she was swinging on a trapeze. and every time, i got a text saying, tiana, you have to try this.
yesterday, justine had posted videos of herself skateboarding. not just skateboarding, of course, but doing stunts, too. daredevil stuff. id only tried skateboarding once, and it had left me with a chipped front tooth. no way was i going to try that again.
bravery comes in many forms, grandma declared.
right, i said glumly.
how is tiana different from justine?
tiana is less social than justine.
tiana is more athletic than justine.
tiana is more carefree than justine.
tiana is less adventurous than justine.

Explanation:

The text states Justine does daring activities like a 100-foot water slide, trapeze, and stunt skateboarding, while Tiana is scared to try these after a bad skateboarding experience and feels she can't match Justine's bravery. This shows Tiana avoids risky, adventurous acts compared to Justine.

Answer:

Tiana is less adventurous than Justine.