Five-year-old Donna uses shorter, simpler sentences when talking to her baby brother. She speaks in a very informal way with her friends and uses a more formal language with her father's friends. Donna is demonstrating her grasp of

pragmatics  

Explanation:

Pragmatics, in psychology, is described as the study of an individual's capability of "natural language speaker" to communicate beyond the factor that has been stated explicitly. An individual's capability to understand and comprehend speaker's or someone else's intended meaning. It encompasses the process through which words have been utilized by a person.

As per the question, Donna is demonstrating her grasp of pragmatics.

c

explanation: because you need to reduce the pollution on land,the exhaust fumes will stop,and stop it in water,the oil that is in the oceanharms the fish   sorry if you   have been waiting long