Final answer:
The cabinet-level department in question is the U.S. Department of Agriculture (USDA), which addresses agricultural production, safety, and marketing, as well as managing food and nutrition welfare programs like SNAP. The correct option is D.
Step-by-step explanation:
The cabinet level department of the executive branch responsible for programs related to the production, safety, and marketing of agricultural products, as well as administering various welfare programs designed to provide food and nutrition services, is the U.S. Department of Agriculture (USDA).
The USDA oversees the Supplemental Nutrition Assistance Program (SNAP), which is a significant part of the federal government's welfare initiatives, offering food assistance to those in need. The FDA (Food and Drug Administration), on the other hand, is a part of the U.S. Department of Health and Human Services and is focused on protecting public health by regulating food safety, medications, and other products, but it is not a cabinet-level department like the USDA.
The USDA also supports the agricultural sector with various federal programs such as price supports and crop insurance, which help ensure a consistent supply of food in the United States. The USDA works in conjunction with other federal agencies, including the FDA, but it has the key role in overseeing agriculture-specific and food-related welfare programs.