I don't understand why conservar is a better choice for this question than guardar. I thought that "conservar" was better for "keeping things in good condition" and "guardar" is better for "keeping things safe". Thanks!
It must be kept out of the reach of children.
Kwizbot's answer:
Se debe conservar fuera del alcance de los niños.Your answer:
Se debe guardar fuera del alcance de los niños.