Given the fact "if seeds stick to the fur of an animal then that seed will be transported by the animal", what is the answer to the question or completion "Sticky balls from a plant can grow a new plant miles from the original because"

Pick from: 1. a bear unknowingly transported it. 2. they bounced when they fell. 3. they were transported by ants. 4. they were carried there by a pterosaur.
1.