The correct option is B Dany's features are so prominent; she has beautiful lavender eyes.
An adjective is usually placed before the noun it modifies.
The
underlined adjective "lavender" is an adjective of colour, it must be placed
before the noun it qualifies, i.e., "eyes". This cannot be seen in the
given sentence, hence option A is incorrect. The correct placement is seen in B, hence the right option is B.
Option C is incorrect because when two adjectives (beautiful: adjective of quality, lavender: adjective of colour) modify the same noun "eyes", the order must be as follows: adjective of quality, adjective of colour.
Option D is incorrect because 'lavender' cannot modify 'features' as it is an abstract noun; it must modify the relevant noun, eyes.