The wild robot protects in the third book of the series “The Wild Robot.” In the first 30-40 pages of the book, Bright bill ( the geese who is the son of the robot) Just came back from a flight with his flock where he met up with his mom and some other animal friends. A bit later they see a sick seal down at the beach that is washed up and poisoned. Then the seal warns them about the poisoned ocean as they gather around him.
” Roz could see the poisoned tide creeping across the shore, the sea foam glowing with unnatural colors. As animals fled inland she moved towards the danger. The otter pup was stranded, crying out. She plunged into the churning water, metal feet slipping on slick rocks, but she didn’t stop. Her programming told her to survive but her heart, yes, heart told her to protect.”
Roz had just wanted to come back to the island to be with her son. It was the place were she made friends, found her son, and raised her son. On the farm she was forced to work so she couldn’t help anyone on the island where Roz herself was raised. So she wanted to do what she couldn’t do all that time on the farm and save all her old friends from the island. She missed the island live and all she wanted to do was live peacefully with her son and the animals of the island. That’s why should would do anything to protect them.