“Embellished” means to make (something) more attractive by the addition of decorative details or features.
Option C is the correct answer because “to adorn” means to make something more beautiful and attractive, hence it is the correct answer.
Option A is incorrect because “filled” means completely occupied, which is not related to the given word.
Option B is incorrect because “replete” means filled or well supplied with something, which is not related to the given word.
Option D is incorrect because “sprinkled” means to cover with small droplets, which is incorrect for the given word, hence incorrect.