Your personal values affect how you think, what you do and how you do it. Your background, upbringing, experiences and relationships will all have played a part in the way you see things. Sometimes your attitudes and beliefs could lead you to assume things about people that are not right or fair.
Answer:
The answer is A, Both have a crest and a trough.
Explanation:
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Since no human is breathing anymore, the Carbon di-oxide cycle will be affected. In fact, many natural cycles will become free from human disturbance.