11. What does Amir learn about Hassan and Baba? Answer
with specific detailed

i think the life is invaluable.

you can also say immeasurable.

there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.

what part is in bold?