Concept:An individual's genetic makeup sets potential limits, while the environment shapes development within those limits. This interaction means genes affect how a person responds to environmental qualities.Explanation:Human traits (height, intelligence, personality) result from gene‑environment interaction. Genes provide a range or limit; environment determines where within that range the individual develops. For example, a person with genes for short height cannot become very tall even with excellent nutrition. Similarly, intelligent parents may provide books, encouraging reading in their children. Thus, genetic makeup directly impacts how an individual responds to environmental influences. The other options are false: adopted children's IQs differ from siblings due to different genes; experience strongly influences brain development; schooling significantly affects intelligence.Answer:Option A is correct: Genetic makeup impacts responsiveness of an individual to qualities of the environment.