Which task is performed by a geographic information system (gis)?

(a) identifying areas with less oxygen
(b) finding zip codes of areas with high population
(c) recognizing the location where an accident has occurred
(d) showing the number of people walking across a bridge

A geographical information system (GIS) describes about a computerized system, which enables the data collection from satellites around earth orbit. It helps in storing, controlling, and evaluating information.

GIS helps in the identification of zip codes of areas with high populations.  It provides better knowledge and access to topographical and surface information of particular regions to get data about the population density of that area.

Learn more about geographic information systems here:

link

(B) Finding zip codes of areas with high population  

Explanation:

A geographic information system (GIS) is designed to display data related to location.  

You can express the location in different ways, such as address or ZIP code, and the system can include data like population density.

The diagram below shows the population density in the zip codes of a given county.

(A) is wrong. The concentration of atmospheric oxygen is about the same everywhere (but the amount of pollution isn't).

(C) is wrong. GIS is not of much use in recognizing the location of an accident, but it could be useful if you plotted the locations of many accidents over a period of time.

(C) is wrong. GIS is not of much use in examining the traffic over a single bridge, but it might be useful for comparing the traffic over many different bridges in an area.