Modern, human-caused climate change is escalating the threats that make sea walls necessary. Sea levels are rising, putting communities at greater risk from floods. Storms are intensifying, causing more and more sand to erode from beaches.
<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>
<span>Internal deformation is
one of the major mechanisms through which a glacier flows. This process occurs
due to the overlying weight of the glacier that leads to the deformation of ice
crystals. Since the pressure is highest at the glacier bed, this process takes
place at that point. The mechanism of movement is usually determined by the
type of glacier.</span>
Collision is most likely to cause earthquakes
