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The answer is 1: That is the best chocolate cake I have ever tasted.
A superlative adjective expresses the greatest amount or degree that a given descriptor can sustain. It usually is differentiated from a comparative adjective which only expresses a relative degree of a descriptor between two or more things. A superlative is then an absolute entity that expresses the greatest possible quality. In the answer above, the chocolate cake is the BEST cake, meaning there is no better cake.
We can see that the sentence that uses a superlative adjective correctly is: That is the best chocolate cake I have ever tasted.
What is superlative adjective?
Superlative adjective refers to the adjective that is used in comparison to actually describe a particular thing that of the highest degree. In other words, superlative adjectives are used to describe something of the highest degree.
We can see here that "best chocolate" describes the chocolate of be of the highest degree. Hence, it's a superlative adjective.
Learn more about superlative adjective on https://brainly.com/question/24343382