Final answer:
The adjective 'REAL' emphasizes that the thing being described exists or is true. It is used to describe things that are authentic, genuine, and not imaginary or illusory.
Step-by-step explanation:
The adjective 'REAL,' derived from the Latin root 'RES,' meaning 'thing,' emphasizes that the thing being described exists or is ___ (D) True. 'REAL' is used to describe things that are authentic, genuine, and not imaginary or illusory. It is often used to differentiate between what is factual and what is not. For example, if something is described as a 'REAL diamond,' it means it is a genuine diamond and not a fake or imitation.