<u>Answer:</u>
<em>Anytime observations need to be clarified. When an unusual condition need to be shown for later reference.</em>
<u>Explanation:</u>
Instead of just recording the data the is sometimes important to be sketched out as the data observed is needed to be clarified and also sometimes there is an unusual condition that occurs and hence, it is important to sketch it so that it can be used for later reference.
<em>Therefore, when we are aware of the situation we need not sketch the data.</em>
Answer:
The cities have a much larger populations in smaller areas, which can cause more crime and overcrowding, along with pollution.
The overall climate of the Atacama desert is between 0 and 25 degrees Celsius. As well as being a very cold place, the Atacama desert is also
one of the driest, with some areas having not received rainfall in over
300 years.
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An organism is a living thing.
So the correct answer is C.