Explanation:

- The Singapore government has taken strong steps by deporting ten Indian students.

- Option 1: Vandalising - This means causing deliberate damage or destruction to property, which usually results in punishment but is not directly linked to general government rules.

- Option 2: Aiding - This involves helping someone do something. While aiding in illegal activities might get you deported, it doesn't specifically fit this context.

- Option 3: Verifying - This means checking something for accuracy or truth. It typically doesn’t lead to deportation.

- Option 4: Violating - This means breaking or disregarding rules or laws. ?? This is the most appropriate term in this context, as deportation would likely result from breaking governmental laws or rules.