Question

insert commas as needed to separate coordinate adjectives.
overcome with emotion, hansen immediately embraced his beloved, childhood friend. the two spent the next few hours recalling the exciting, fun - filled summer afternoons of their youth.

Explanation:

Coordinate adjectives are adjectives that equally modify a noun and can be reordered or joined with "and" (with the same meaning). We insert commas between them.

1. "Overcome with emotion" has no coordinate adjectives, so no extra comma is needed here.
2. "beloved, childhood friend": "beloved" and "childhood" are coordinate adjectives (they both describe "friend", and we could say "childhood, beloved friend" or "beloved and childhood friend"), so a comma is required between them.
3. "exciting, fun-filled summer afternoons": "exciting" and "fun-filled" are coordinate adjectives (they both describe "summer afternoons", and we could say "fun-filled, exciting summer afternoons" or "exciting and fun-filled summer afternoons"), so a comma is required between them.

Answer:

Overcome with emotion, Hansen immediately embraced his beloved, childhood friend. The two spent the next few hours recalling the exciting, fun-filled summer afternoons of their youth.