Which works to solve environmental challenges by raising awareness, fundraising, and influencing policy?

1a-government agencies
2b-non-government agencies
3c-international treaties
4d-national laws

The one that works to solve environmental challenges by raising awareness, fundraising, and influencing policy is: non-government agencies 
The government often unwilling to address environmental challenge because it will become a huge expense in their Annual Budget. So, most active organization that fight for Environmental issues today tend to be a non-government agency, such as Green Peace.

Ibelieve it would be homer plessy