Isthmus means a narrow strip of land, which is exactly what Central America is.
Isthmus represents a land that is in narrow strip form, which does both that is separate two sea bodies as well as** joints** two landspecaes .
Central America is regarded as the isthmus due to its feature of connecting lands that is Mexico and South America . Similarly, it separates the pacific ocean with Caribbean Sea .
Therefore, Central America starts from the south where there is Mexico towards the** northwestern regions** from where South America starts.
Learn more about Central America as isthmus here:
https://brainly.com/question/25320732
Central America is designated as an isthmus because it is a narrow land connection between North and South America, separating the Pacific Ocean and the Caribbean Sea. The Isthmus of Panama is particularly notable for being the narrowest part of this region. Its geographical features and historical significance reinforce its classification as an isthmus.
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