Politicians are policymakers or legislators whose job is to negotiate and pass laws (which contains many policies) and decide how much money is committed to enact certain laws. Politicians are responsive to the needs of their districts (who they represent) and special interests so they will try to, for example, negotiate more money in laws for certain initiatives that impact their constituents.

Politicians propose laws and sometimes the laws are directly written by policy organizations or special interest groups.

Dude, you need to talk to someone about this. You’ve asked a few basic questions about policymaking in general over the past week and you’re having a hard time understanding basic concepts. If you want to talk on the phone, let me know.