Adjectives are the words that define/explain nouns or pronouns. For example: Roshni is pretty. Here, 'Roshni' is the noun and 'pretty' explains how she is, hence 'pretty' is the adjective.

Adverbs are the words that describe action words (verbs). For example: Ram fought bravely. Here, 'Ram' is the noun and 'fought is the verb. 'Bravely' describes how he fought, hence it is the adverb.

NOTE: The first blank requires an adverb to describe how she dressed up, and the second blank requires an adjective to describe her.

Option A - 'Beautiful' is an adjective and hence can't be used to fill in the first blank. 'Beauty' is a noun and hence it can't be used fill in the second blank. Thus option A is incorrect.

Option B - 'Beauty' is a noun and 'beautifully is an adverb. As we need an adverb for the first blank and an adjective for the second blank, we can't use 'beauty, beautifully'. Hence, option B is incorrect.

Option C - 'Beautifully' is an adverb and hence it can't be used with both the sentences. Thus option C is incorrect.

Option D - 'Beautifully' is an adverb which can be used to describe how she dressed up. 'Beautiful' is an adjective which can be used to describe her (how she looked). Hence, option D is the correct answer.

'She dressed up beautifully and looked beautiful.'