Answer:
Comparative: heavier.
Superlative: heaviest.
Explanation:
Comparative is called the verb conjugation by which a difference is marked between two specific situations, where one has a marked difference over the other. In turn, it is called a superlative to the verb conjugation where the quality of a certain event is exalted, without there being a comparison with another.
In the English language, comparatives and superlatives follow different grammatical rules depending on the verb in question. Thus, for comparison, some verbs use the expression "more ... than" while others add an ending -er to the verb in the infinitive. The same occurs with the superlative, where some verbs use the expression "the most ...", while others add an ending -est to the verb in the infinitive.
