Central governments manage national borders and security

Steps:

• Identify central government roles: handling national defense, borders, and international affairs.
• Evaluate options: Check if each involves national vs. local or private duties.
• Compare to typical responsibilities: Immigration is federal; local security or private enforcement is not.
• Select the best match: Option A aligns with national authority.

Why A is correct:

• Central governments control immigration under international law and national sovereignty, providing 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: Ticket inspectors on trains are typically local transport authority or company staff.

Final answer: A