Which of the following is true about the U.S Secretary of Homeland Security?

The statement regarding the Secretary of Homeland Security being responsible for immigration policies is accurate. The Department of Homeland Security (DHS) plays a crucial role in managing the nation's immigration system, enforcing immigration laws, and overseeing related matters. This encompasses a wide range of duties, including border security, naturalization, and the administration of immigration services. Therefore, the Secretary of Homeland Security is indeed a principal figure in shaping and implementing America's immigration policies, ensuring that they align with national security objectives and overall public safety.

The other options refer to different aspects; for instance, the establishment of the DHS in 2002 marked a significant reorganization in how the U.S. handles security-related issues but does not pertain directly to the specific responsibilities of the Secretary regarding immigration. Additionally, military operations are typically under the purview of the Department of Defense, and Kristi Noem is not the Secretary of Homeland Security, which further emphasizes that option as incorrect.