How does ruby's gift of the jar of tadpoles symbolize tom's life?

The story is about Tom, who is a young boy born with a heart that had a hole. However, the breach does not cause him an immediate death; however, he experienced slug and faint excitement. The doctors had said initially that his lifespan is sixteen and will only reach eighteen if he is lucky. This, therefore, made Tom always careful about anything. Ruby make his life safer by still being there for him by doing everything that made him happy. she brought him a jar that turned out to save his life.

the teacher i would like to have must be a kind, caring and understandable teacher. she should be interactive with us and always plan fun activities to in our studies. she should be a teacher who would correct our mistakes when we do something wrong and guide us if we are weak. she should always be strict if we do something bad but must be praising us when we do something good. she she not take any as her favorite in her class but take everyone as her favorite.

(i hope this will u if there is something send me a reply)