1) Explain He senses first responsibility.
2) What does In a world of possessions mean.
3) What advice does the poet give to the little boy in the last line.

Dear Student,

1. The boy loses his ball and gets upset. This was his first lesson in sensing first responsibility. He has the experience of losing something and learning how to cope up with the loss. He understands the nature of loss or what it means to lose something. He now will be more responsible and vigilant to avoid losing something in future.
2. 'In a world of possessions' means that the world is full of materialistic things. People are driven by the urge to own or possess things and in such a world, losing something of value is inevitable. Losing the ball makes the boy realise the meaning of loss in this materialistic world.
3. According to the poet the boy has to understand the nature of loss. He has to understand what it means to lose one's possession. Gain and loss are the two sides of the same coin. The poet expects that through this incident and it's sorrow the boy will learn how to move forward despite the losses he suffers.

Regards