a. Glass bulbs
d. Pine and Spruce cones
c. Martin Luther
The first person to decorate a Christmas tree was reportedly the Protestant reformer Martin Luther (1483-1546). According to legend, he was so moved by the beauty of the stars shining between the branches of a fir tree, he brought home an evergreen tree and decorated it with candles to share the image with his children.
Gulevich, Tanya. 2000. Encyclopedia of Christmas. Detroit, MI: Omnigraphics, Inc.