Final answer:
The excerpt from 'Barrio Boy' reflecting the author's feelings about his childhood details a happy upbringing filled with laughter, love, and a close-knit family atmosphere.
Step-by-step explanation:
The excerpt from Barrio Boy that shows the author expressing his feelings about his childhood is from the LibreTexts quote: "But the truth is that I had a very happy childhood, full of laughter and love, in a very close-knit family." This sentence directly conveys the author's emotions and memories associated with his childhood, highlighting the happiness and affection that marked his early years. It stands in contrast to other excerpts which might describe childhood in different tones or from various perspectives but do not express the author's personal feelings as clearly as the quote from LibreTexts.