Question

fix the two plural or possessive errors.

most childrens interest in stars wanes as they get older. but one childs fascination led him to study physics at harvard and astrophysics at columbia university. that child, neil degrasse tyson, became director of the world - renowned hayden planetarium in 1996.

Explanation:

Step1: Fix "childrens"

"children" is the plural of "child", so "childrens" (incorrect plural) should be "children's" (possessive to show the interest belongs to children).

Step2: Fix "childs'"

For "one child", the possessive is "child's" (not "childs'").

Answer:

Most children's interest in stars wanes as they get older. But one child's fascination led him to study physics at Harvard and astrophysics at Columbia University. That child, Neil deGrasse Tyson, became director of the world - renowned Hayden Planetarium in 1996.