Meaning: The farmers employed bamboo as a material for constructing structures.
Choice of Words: Used and building are verbs that describe the purpose and action related to the bamboo.
Alternative Expressions
Farmers utilized bamboo in construction.
Meaning: This sentence is a more formal way of saying that farmers used bamboo to build things.
Choice of Words:Utilized is a more formal way of saying used. Construction is a more specific word for building that refers to the act of constructing something.
Bamboo was a building material for farmers.
Meaning: This sentence tells us that bamboo was one of the materials that farmers used to build things.
Choice of Words:Material refers to something that is used to make something else. In this case, bamboo is the material that is used to make buildings.