The central idea of the text is developed around the concept of "construction".
Explanation:
The text talks about how human beings are built, both in biological and behavioral ways. For this, the text creates an environment where it relates the construction of the human being with the construction of residences and shows how different factors allow residences to be built, so that human beings are built. After presenting this concept, the text describes how we are constituted physically and biologically by our genes and how it is immutable and does not depend on our will.
The text also shows how we are built psychologically and behaviorally by the environment in which we live. This construction, however, is changeable, since we can modify the environment in which we operate, as well as our personality.
