It would be D. Informative
An individual or a group of individuals can actually maintain a certain quality of language and usage for a special amount of time as long as they continuously use a particular level of vocabulary, grammar and pronunciation. Language changes over time, in general and within individuals through life. If somebody's job or education requires, for example, the usage of complex language features, then it is likely that the person will perpetuate such characteristics.
Answer:
1.) Because matter is made up of molecules, the behavior of matter is dictated by the behaviors of the molecules. If the molecules were different, matter would be different.
Example: water expands when it freezes
2.) Engage the audience — get them interested, give them a reason to listen. How?
Describe a scene or a character.
Tell a story.
Share a personal experience.
Relate to a recent event.
Piggyback on a previous speaker's remark or theme.
Point out something important about the audience or the current setting.
Explanation: I hope this helps :)