Final answer:
The central government agency responsible for providing news on the war was the Committee on Public Information (CPI). They used various methods to shape public perception of the war.
Step-by-step explanation:
The central government agency responsible for providing news on the war was the Committee on Public Information (CPI). This agency was created to manage information related to America's participation in World War I and influence public opinion in favor of the war. The CPI used various methods, such as pro-war propaganda, public speeches, and posters, to shape public perception of the war.