The question is: Match the following: A. Federal government management B. Foreign policy, international relations C. Nature management, environmental protection D. Social protection, including social security 1. Only the federal center 2. Jointly with the federal center

Assignment:

• A. Federal government management - 1. Only the federal center (Federal property and its management are typically exclusive competence of the federal government.)
• B. Foreign policy, international relations - 2. Jointly with the federal center (While foreign policy is a federal responsibility, regions can have some participation in external economic relations, hence "jointly" is more appropriate than "only the federal center".)
• C. Nature management, environmental protection - This is a shared competence between the federal government and the subjects of the Russian Federation. Thus, it could involve both 'only the federal center' (for federal-level resources/issues) and 'jointly with the federal center' (for regional and common issues). However, given the options, it's most closely aligned with shared responsibility, implying it can be handled by both. Without a direct match, and considering that federal laws set the framework, a strong case can be made for federal oversight, but regional participation is significant. Let's tentatively link it to federal responsibility but acknowledge the shared nature. If forced to choose between 1 and 2, and knowing that environmental protection often involves federal standards and regional implementation, 'jointly' (2) or a separate category would be ideal. As it stands, it's ambiguous without more context. However, in the context of state powers, broader environmental regulation is federal, while specific implementation and management can be regional. Let's assume for this exercise that 'Nature management, environmental protection' as a broad category implies federal framework and often joint action.
• D. Social protection, including social security - This is also a area of shared competence. Federal laws establish the basic principles and norms, and regions implement and supplement them. Thus, "jointly with the federal center" is the most fitting, though federal minimum standards are key.

Note: The provided options (1. Only the federal center, 2. Jointly with the federal center) do not perfectly map to all categories C and D, which often represent shared competences. However, based on typical Russian federal structure:

• A. matches 1.
• B. matches 2.
• C and D are typically shared, but if forced to choose between exclusive federal or joint, the nature of these powers leans towards joint responsibility or at least federal framework with regional implementation. Option 2 ("Jointly with the federal center") best describes the interaction for C and D in many cases.

The question asks to establish correspondence, and the provided options are limited. If we must provide a definitive match based on common understanding of Russian federalism:

• A. Federal government management -- 1. Only the federal center
• B. Foreign policy, international relations -- 1. Only the federal center (Foreign policy is exclusively federal)
• C. Nature management, environmental protection -- 2. Jointly with the federal center (Shared competence)
• D. Social protection, including social security -- 2. Jointly with the federal center (Shared competence)

Final Answer based on typical federal competencies in Russia:

A - 1

B - 1

C - 2

D - 2