The BEST explanation of why population I (read as: one) stars have a higher proportion of elements heavier than helium than population II ( read as: two) stars, is because Population I stars are:
W) younger than population II stars
X) older than population II stars
Y) usually closer to planetary nebula than population II stars
Z) often found near H-I (read as: H, one) regions
✔️Answer:W) YOUNGER THAN POPULATION II STARS
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