ANSWER
[tex]A.\text{ }0.5\text{ }cm[/tex]
EXPLANATION
To find the amplitude of the wave shown, we have to find the difference between the crest and the trough of the wave and divide it by 2.
The crest of the wave is at 2.0 cm and its trough is at 1.0 cm.
Hence, the amplitude is:
[tex]\begin{gathered} A=\frac{2.0-1.0}{2} \\ A=\frac{1.0}{2} \\ A=0.5\text{ }cm \end{gathered}[/tex]
The correct answer is option A.
