What adjective form can complete the sentence?

The adjective form that completes the sentence is taller. Adjectives are words used to modify or describe an individual or thing in the sentence. However, it has a degree of comparison, known as positive, comparative, and superlative through positive doesn't show degree.

In the above sentence, the degree used is comparative; this is because the comparative adjectives are made use of to compare differences between two objects they modify. Adjectives are one of the essential parts of speech, which gives room for a sentence to have meaning.