Respuesta :

It’s called a building because the 'ing' in the English language is added to certain verbs to make them nouns.
The verb 'built' is suffixed with 'ing' to make the thing a noun- Building.

Answer:

We often add ing to a verb to name the thing created by the action of the verb. It's added to some verbs to make them nouns. You paint and create a painting. You carve and create a carving. You draw and create a drawing, and you build and create a building.

Explanation:

I hope this helped :)