Central governments manage national borders and security

Steps:

• Identify central government roles: handling national-level issues like borders, defense, and international affairs.
• Evaluate options: Check which involves cross-border or national authority versus local or private matters.
• Compare to typical responsibilities: Immigration control is federal, while security and inspections are often local or commercial.
• Select the best fit: Option A aligns with national sovereignty.

Why A is correct:

• Central governments control immigration under international law and national sovereignty, requiring officials at entry points like airports.

Why the others are wrong:

• B: Shopping centres are private property, so security cameras are managed by owners or local businesses.
• C: Banks handle their own security through private firms, not government.
• D: Train ticket inspectors are typically employed by transport companies or local authorities.

Final answer: A