The answer is Has some negative effects on humans
The correct answer is D, the repetition intensifies the speaker's sense of urgency.
- The use of the word "must" in this excerpt does not show any sign of anger. Anger could be expressed by the use of exclamation marks, for example, or adjectives, but not by the use of "must". Therefore, it also doesn't suggest that the speaker is intimidating or demanding.
- The use of repetition is what gives us the sense of urgency. By being followed by different sentences, always using the word "must", we feel that this is important and we need to hurry up and do it.
A. friends is supposed to be spelled friend's to show ownership
It is Hasty generalization. Hope this helps and I'm not too late!
Language is arbitrary because it is based on social agreement. There is no reason or explanation to why things are named the way they are.
Language is a system of sounds and signs that must be organized according to some patterns in order to achieve communication. Therefore is systematic.
Hope it helps.
:)