The fact that Walter said "That money was made out of my father's flesh" means that a. his father worked hard and saved it.
When something is said to have been made out of a person's flesh, it means that the person worked hard to earn it.
This comes from the logic that when working extremely hard, you succumb to injury several times which translates to losing flesh.
Find out more on "A Raisin in the Sun" at https://brainly.com/question/7326547.
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