Answer:
a. Words peculiar to a professional realm, science, trade, or occupation- jargon.
b. An informal style of speech- slang.
c. A type of register that incorporates Standard American English and is used by professionals or in situations where people are not familiar with one another- formal register.
d. A type of register used with more familiar people in casual conversation- informal register.
Explanation:
a. Jargon is the special or specific words or expressions used by a particular group of people among themselves. This group pf people may be mostly among professionals of a particular profession, thus making the use of those words difficult to understand by the people who are not familiar or part of that profession.
b. Slang is the style of speech used in a casual conversation, which cannot be used in professional settings. It is also a very common and informal form of language that is used among a particular group of people.
c. In a formal register, the Standard American English is incorporated and used in a formal setting which follows a particular prescriptive format. It is used by professionals where people are not familiar with each other. And there is an air of professionalism rather than a casual one. It does not use colloquialisms or contractions in its conversations.
d. Informal register is the casual and informal way of conversation that is majorly among friends and relatives or known/ close associates. it can be used in a casual daily conversation, and uses all forms of contractions and even first person pronouns.
