Which letter shows the amplitude of water wave

K

Explanation: Imagine if there was a line that separated the waves in half. K is the answer because it measures the change over a single period. J is not the answer because it measures the whole wave and L is not the answer because it includes a section that is not a part of the wave.

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The answer is K because it measures the change from 1 point.

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the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

it is because according to the process , scientific inquiry is a process with many steps because each step occurs to the scientist and if you just skip a step there would be no steps to scientific inquiry.