Answer
We can rank the waves in order of amplitude, from largest to smallest:
$b = e \gt a \gt c = d$
Work Step by Step
The amplitude is the maximum distance each point moves away from the center during each cycle. We can count the units from the center of the wave to find an expression for the amplitude for each graph.
(a) $A = 3~units$
(b) $A = 4~units$
(c) $A = 2~units$
(d) $A = 2~units$
(e) $A = 4~units$
We can rank the waves in order of amplitude, from largest to smallest:
$b = e \gt a \gt c = d$