They were used to deliver messages. Apparently, they had spy birds. Even today. Which I think is kinda wrong...
They also symbolize freedom and diversity. Also, secrecy.
I hoped this helped.
Answer:
Evidence.
Explanation:
Evidence is the concrete facts used to support a claim. ... Many arguments begin by treating something as a claim, try to prove it, and then, once they have proved it to the author's satisfaction, treat it as a fact to be used as evidence to support some new claim.
D set up shelters for those who lost homes
Yesterday i walked to the shops