Explanation:

- Barriadas (Latin America), barrios (Spain/Latin America), favelas (Brazil), and gecekondus (Turkey) are all names used in different countries for informal, often illegal settlements that arise due to rapid urbanization and housing shortages.

- These places usually lack basic services and infrastructure and are commonly known as "slums" or "squatter settlements."

- A "hamlet" (Option 3) is a very small rural settlement, not related to slums or informal urban housing.

- A "village" (Option 4) refers to a rural settlement, usually larger than a hamlet but planned and legal.

- A "slum" (Option 2) is a highly populated urban residential area characterized by substandard housing and squalor.

- "Squatter Settlement" (Option 1) means areas where people occupy land illegally and build makeshift homes, which applies to the terms given.

Correct Answer: Option 1, Squatter Settlement.