When you use an indefinte article, you are referring to of a class of people, places or things. masculine and feminine a specific group any one part

"Any one" should be the right answer.

answer: researching and understanding issues being considered by lawmakers.

explanation:

lobbying is the act of attempting to influence a politician's behaviour. lobbyists can be members of a constituency, organizations, businesses, non-profit organizations or professional lobbyists.

i think the answer is the one about environmental and social health.

hope this