Which of the following sentences contains formal language, rather than informal language?
A. The blue-footed booby is a magnificent specimen.
B. When traveling alone, be on the lookout for pick-pockets.
C. If you can't take the heat, get out of the kitchen.
D. I didn't want to tell on my friends, but the teacher gave me no choice.
Formal language is less personal than informal language. It is used when writing for professional or academic purposes like graduate school assignments . Formal language does not use colloquialisms, contractions or first-person pronouns such as "I" or "We." A is the correct use of formal language as there is no personal information or first person pronouns used to bring out the message.
Therefore, the Correct Answer is A.