Question

Have you ever visited a town or village after a few years to find any changes in infrastructure since you visited last
a) where do you think the materials came for this infrastructure
b) what are the ways to check the use of these raw materials​

Answer 1

Answer:

slum is usually a highly populated urban residential area consisting mostly of closely packed, decrepit housing units in a situation of deteriorated or incomplete infrastructure, inhabited primarily by impoverished persons.[1] Although slums, especially in America, are usually located in urban areas, in other countries they can be located in suburban areas where housing quality is low and living conditions are poor.[2] While slums differ in size and other characteristics, most lack reliable sanitation services, supply of clean water, reliable electricity, law enforcement, and other basic services. Slum residences vary from shanty houses to professionally built dwellings which, because of poor-quality construction and/or lack of basic maintenance, have deteriorated.[3]

Answer 2

Answer:

in which area of largest in the world