Which individual is personally trying to influence public policy?

You're question isn't completely specific, but if I'm reading correctly I would tell you that interest groups influence public policy through lobbying of their interests.  This is a group of individuals who sign petitions, protest, and voting for example. I hope this helped :)

is this a question? put a question ?

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions