Which of the following environments typically lacks basic services?

Shanty towns are informal settlements often found on the outskirts of urban areas, characterized by substandard housing and a lack of basic services. These areas typically do not have adequate access to clean water, sanitation, electricity, or waste management facilities. This deficiency arises because shanty towns are usually constructed without formal planning or legal status, leading to their exclusion from government services and support.

While options like rooftop slums and favelas also face challenges related to services, shanty towns are specifically noted for the more pervasive absence of these essential services. Public transport is a service itself and does not reflect the condition of basic living infrastructures found in informal settlements.