Vibert is shorter than David. The underlined word is a __ a. superlative adjective b. comparative adjective c. superlative adverb d. comparative adverb

## Step 1The problem is asking us to identify the type of adjective or adverb that the underlined word "shorter" is. ## Step 2In English grammar, adjectives are used to describe or modify nouns, while adverbs are used to describe or modify verbs, adjectives, or other adverbs. ## Step 3The word "shorter" is used to compare the height of Vibert and David. It is indicating that Vibert is of lesser height than David. ## Step 4This type of comparison is characteristic of comparative adjectives. Comparative adjectives are used to compare differences among the two objects they modify (they are describing). They are used to show that one thing is more (or less) of a certain way than another thing. ## Step 5Therefore, the underlined word "shorter" is a comparative adjective.