Question

order the topics from broadest to narrowest.
broader
infrastructure projects conducted by the public works administration
historic infrastructure projects of president roosevelts new deal
historic infrastructure projects of the 20th century
bridge-building projects conducted by the public works administration

Explanation:

1. Start with the widest category: "historic infrastructure projects of the 20th century" covers all 20th-century historic infrastructure, which is the broadest scope.
2. Narrow to a specific 20th-century program: "historic infrastructure projects of President Roosevelt's New Deal" focuses on a single U.S. policy initiative within the 20th century, a subset of the broader 20th-century category.
3. Narrow further to a specific agency within that program: "infrastructure projects conducted by the Public Works Administration" targets one specific New Deal agency's infrastructure work, a subset of New Deal projects.
4. The narrowest is a specific type of project from that agency: "bridge-building projects conducted by the Public Works Administration" focuses only on bridge construction by the PWA, the most specific subset.

Answer:

1. historic infrastructure projects of the 20th century
2. historic infrastructure projects of President Roosevelt's New Deal
3. infrastructure projects conducted by the Public Works Administration
4. bridge-building projects conducted by the Public Works Administration