A mother fulfils her child's needs and wishes.
And the last one could be when the mother is at her weakest she still tries be strong, because her child needs to rely on her.
Explanation:
The author´s primary purpose is to compel readers or audiences to take action, convince them an idea through an argument, or to confirm their belief´s.
Answer Literal
Example:
"Techniacally it doesn't actually fly, it's just a metal plane model."