According to data cited by the World Economic Forum using UN Habitat figures, which city is described as the world most crowded city?

Introduction / Context:
Population density and urban crowding are important topics in urban studies and global development. The World Economic Forum, using data from UN Habitat, highlighted certain cities as the most crowded in the world. This question asks you to identify which city was described as the world most crowded city according to that data. It tests your awareness of global urban issues and rankings, which are often used in general knowledge questions.

Given Data / Assumptions:
The question gives the following elements:
1. The ranking is based on data used by the World Economic Forum, citing UN Habitat figures.
2. We are asked to name the world most crowded city according to that source.
3. The options are Mumbai, Lahore, Lagos and Dhaka.
4. We assume that the candidate knows that crowding here refers to very high population density within the city area rather than total population alone.

Concept / Approach:
The concept is to connect population density statistics with major global cities. Dhaka, the capital of Bangladesh, is widely regarded as one of the most densely populated cities in the world, often ranking at or near the top in population per square kilometre. The approach is to recall that the World Economic Forum highlighted Dhaka as the most crowded city in terms of people per unit area, while Mumbai, Lahore and Lagos, although very crowded, did not exceed Dhaka density in that particular ranking.

Step-by-Step Solution:
Step 1: Consider each city in the options and recall general information about its population and density. Step 2: Mumbai is extremely crowded and often appears in top lists, but in the specific World Economic Forum citation, Dhaka surpassed Mumbai in density. Step 3: Lahore and Lagos are also densely populated, but they were not identified as the very top city in that list. Step 4: Dhaka has a very high number of people living in a relatively small urban area, making its population density extremely high. Step 5: Therefore, Dhaka is described as the world most crowded city according to the WEF and UN Habitat data cited.

Verification / Alternative check:
To verify, you can recall or look up summary tables that list global cities and their population densities. Dhaka consistently appears with density figures significantly higher than most other large cities. The World Economic Forum article that discusses the world most crowded cities uses UN Habitat data and places Dhaka at the top. While Mumbai and other cities appear in the ranking, they come after Dhaka, confirming that Dhaka is the correct answer.

Why Other Options Are Wrong:
Mumbai: Although Mumbai is one of the densest cities in India and appears high on global lists, it is not ranked as number one in the WEF citation used here, so this option is incorrect.
Lahore: Lahore is a major city in Pakistan, but its population density is not as high as that of Dhaka according to the referenced data, which makes this option wrong.
Lagos: Nigeria largest city is also very crowded, but it does not top the specific density ranking referenced by the World Economic Forum and UN Habitat in this context.

Common Pitfalls:
Examinees may quickly select Mumbai because they are familiar with its crowding and may not be as aware of Dhaka statistics. Some may also underestimate how high Dhaka density is compared to other cities. Another pitfall is confusing rankings that focus on total population versus those that focus on density. To avoid such mistakes, it is useful to remember that Dhaka is often cited as the most densely populated major city in the world, while Mumbai and others follow behind.

Final Answer:
According to data cited by the World Economic Forum using UN Habitat figures, the world most crowded city is Dhaka.