请问下面英语该填哪个单词?Tody our government made a law to ( )unusual animals .Now pandas are not a ( ) of seeing people.They often go to farmers' houses to eat their food and then walk ( )to their mountains

请问下面英语该填哪个单词?
Tody our government made a law to ( )unusual animals .Now pandas are not a ( ) of seeing people.They often go to farmers' houses to eat their food and then walk ( )to their mountains

protect
afraid
back