The underlined word <em>and </em>is a conjunction.
Conjunctions are used to connect words and sentences, and in this case, <em>and </em>connects <em>unicyclists and bicyclists. </em>
Explanation:
All of the family members in Kafka's The Metamorphosis receive quite a shock upon seeing Gregor's transformation. Their reactions to him and how they choose to deal with the situation all betray their relationships with him, revealing what they actually feel about the young man.
Answer: Jennifer [proper] and Julie [proper], her best friend [common], went to the mall [concrete] and look for towels [concrete]. All [collective] the stores had people [collective] in them, despite the lockdown, so they knew the ball was in their court [abstract]. It was a beautiful day [abstract or concrete].
Explanation: The day was beautiful because it was sunny and warm - concrete, facts. It was also beautiful because they had a good time - abstract, not specific. The ball was in their court - abstract because they could then do what they wanted but were not actually playing ball. All and people are collective nouns, more than one but the words do not end in 's'.
