bias means an opinion against others that is considered unfair for example it would be considered unfair for some people to vote against Donald trump and 80% gos for him as in there is only three people

source means a place, person, or thing from which something originates or can be obtained

credible means a place, person, or thing from which something originates or can be obtained

authority means 

the power or right to give orders, make decisions, and enforce obedience

reliable means to be trusted to what you want it to do

perspective means man s

he ability to see, hear, or become aware of something through the sense

agenda means a list of items to be discussed at a formal meeting.

manipulate means handle or control (a tool, mechanism, information, etc.) in a skilful manner