Answer:
<u>A dislike for</u>
Explanation:
When we are reading, we may an unusual or unknown word within a text, when this happens, we can use the surrounding information to help comprehend the meaning of that word, that is to say, we can use context clues. In the sentence the phrases "taste of oyster" and "had to hold his nose when he ate them" are all sings that he did not like it, thus "aversion" refers to "a dislike for", because when we dislike something, we try to avoid it with either of our senses (We prefer not to see it, not to touch it or not to smell it).
The other options are incorrect because you can not have a fondness for, nor fear or, the taste of an oyster. And since the action of holding his nose was of disgust, he did not have a weakness nor a desire for oysters.
