Often spanish adverbs are formed by using the form of an adjective and adding the suffix –mente.
masculine singular
masculine plural
feminine singular
feminine plural

The correct answer to this question is:

Explanation:

Words ending in -mente are adverbs. These compound words are formed by adding the ending (-mente) to adjectives.

If the adjective is of a single termination, it remains:

Examples:

If it has two endings, it comes before the end, the female variant of the adjective.

Example:

well, if he says unos it is 1, if he says dos, it is 2, if he says tres, it is 3, if he says cuatro, it is 4

the anwser might be la corbata