Final answer:
The question discusses different issues related to defense and material relevance, which could be studied in Social Studies.
Step-by-step explanation:
The question seems to be discussing different issues related to defense and material relevance. It does not fall under a specific subject from the given options, but it can be related to the subject of Social Studies.
Fed, insufficient defense could refer to a situation where the federal government's defense measures are inadequate. This could lead to vulnerabilities and potential threats to national security. An example could be the insufficient defense against cyber attacks on government systems.
Scandalous material, redundant material, or irrelevant material may pertain to inappropriate or excessive content that is not necessary or has no bearing on the topic. An example could be a scandalous news article about a celebrity's personal life that is not relevant to their work or public image.