Well, there is no options to pick from so im going with my gut there are 2 uses for the horns:
#1. They were used for defense
#2. they were used to kill prey
------------------------------------------hope this helps---------------------------------------
A, b, and c are all correct.
take for example finches off of the galapagos islands. they vary from island to island, yet are still the same bird. on one island they have bigger, more durable and stronger beaks, because that island has many nuts to crack open and eat. on another island, they have thin ling beaks, ideal for pecking at insects in the grass on tree bark. evolution is literally survival of the ifttest, where those equipped best will live and those without means to fight for life will die off, leaving those most capable of reproduction and passing down genes.
I think it does make up all of the body tissues and organs.
