Psycholinguistics

It is not accident that the oldest science is astronomy; and the newest one is psychology. The use of language and speech as a window to study to the nature and the structure of the human mind is called psycholinguistics; the term ‘psychology of language’ is used as a synonym for psycholinguistics.  The latter seeks to examine: A) how are language and speech acquired? B) How they are produced? C) How they are comprehended? D) And how they are lost?