For the first question regarding behaviors that could be harmful to reproductive behaviors, the option that highlights a potential risk is:
"Iguanas and tortoises eat very specific leaves, fruits, and flowers, each only available during specific seasons."
This behavior could be harmful because if their specific food sources are not available due to environmental changes or habitat destruction, it could affect their health and ability to reproduce.
For the second question about behaviors that likely contributed to the extinction of the dodo bird, the correct response is:
"Dodo birds were not afraid of the new animals that sailors introduced to their habitat because they had never had predators before."
This behavior made them vulnerable to predation by introduced species, leading to their extinction.