The correct answer is - dysphasic or dysphonic.Dysphasia is a speech disorder that makes it difficult for a person to generate speech and sometimes also understand it. It is generally a symptom of brain damage or disease. Dysphonia is a similar condition but it's caused by a physical disorder of speech organs.
Social stratification<span> is a society's categorization of people into socioeconomic strata, based upon their occupation and income, wealth and </span>social status, or derived power.
Specialization of labors leads towards productivity