When the voices of children are heard on the green, And whisperings are in the dale,
The days of my youth rise fresh in my mind,
My face turns green and pale.
Then come home, my children, the sun is gone down,
And the dews of night arise;
Your spring and your day are wasted in play,
And your winter and night in disguise.
("Nurse's Song" by William Blake)

Which best explains the effect of the tone on understanding the speaker's relationship with the children?
1. The stern tone emphasizes her disapproval of their lazy lifestyle.
2. The resigned tone shows her envy of their youthful innocence.
3. The sad tone stresses her desire to regain her youthful appearance.
4. The concerned tone reflects her fear for the children's safety