Help me about fiber glass… huhuhu Y_Y?

1.) what characteristics of fiber glass make it an excellent material for airplanes?

2.) what are the advantages of using fiber glass over aluminum?

IM REALLY NOT A GENIUS OR SOMETHING AND IM REALLY TIRED OF SEARCHING FOR THE ANSWERS BUT STILL I CANT! SO PLS HELP ME… IM REALLY IN A SAD MOOD. I GOT SO MUCH ASSIGNMENTS… T_T HELP ME ONII-CHAMAS AND ONII-SAMAS!!!!!!!

???kawaii^_~