What is the most likely reason that Zimmer feels calm while watching the swarms of honeybees with Thomas Seely?

Question

1. He sees that the bees behave around Seely
2. He knows that the bees will sting Seely first
3. He sees that Seely is comfortable with the bees.
4. He knows that Seely will kill the bees if they attack.

Answer 1

3. He sees that Seely is comfortable with the bees.