Great egret plumage used to be prized for what purpose?

A Decorating hats
B Filling pillows
C Making archery arrows

Egret plumes, called ‘aigrettes,’ were a fad on the headdresses of fancy ladies in the late 19th and early 20th centuries. Unfortunately, this led to the slaughter of many egrets until the government intervened.

The correct answer is Decorating hats.