Select the option that is related to the third term in the same way as the second term is related to the first term.

AQUARIUM : ZSREMONU :: HUMIDITY : ?

GWJMYOMG

1   2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14

**********************************************************

THE LOGIC FOLLOWED HERE IS :

AQUARIUM : ZSREMONU :: HUMIDITY : ?

A → (-1) → Z

Q → (+2) → S

U → (-3) → R

A → (+4) → E

R → (-5) → M

I → (+6) → O

U → (-7) → N

M → (+8) → U

Similarly,

HUMIDITY : ?

H → (-1) → G

U → (+2) → W

M → (-3) → J

I → (+4) → M

D → (-5) → Y

I → (+6) → O

T → (-7) → M

Y → (+8) → G

Thus, GWJMYOMG is correct.