Answer:
The word "Pretty' as used in this context is an adjective.
Explanation:
Recall that an adjective is a word that modifies or describes a noun in a sentence.
It is used to describe the attributes of a noun. An example of an adjective is
<em>John saw a beautiful lady yesterday.</em>
Here, the adjective here is beautiful and it modifies the noun 'lady'
An adverb, however, shows the degree or extent of something by modifying a verb, adjective, determiner in a sentence.
An example is
<em>The tortoise walked slowly</em>
Here, the adverb here is slowly as it shows how the tortoise walked.
Therefore, the word "pretty'' in the given sentence is an adjective as it describes the noun 'mare'.
What is the question tho?
Im pretty sure its c but don't know for sure
