Final answer:
Sentences a) "Reyna appreciates the mail carrier's punctuality." and b) "Reyna eagerly anticipates the mail carrier's arrival." describe Reyna's positive feelings for the mail carrier, while the other sentences do not convey feelings towards the mail carrier as an individual.
Step-by-step explanation:
The sentences which describe Reyna's feelings for the mail carrier are a) "Reyna appreciates the mail carrier's punctuality." and b) "Reyna eagerly anticipates the mail carrier's arrival." These sentences indicate positive emotions that Reyna has towards the mail carrier.
The sentence c) "Reyna dislikes the mail carrier's uniform." describes Reyna's feelings towards an aspect of the mail carrier, but not towards the carrier themselves. Finally, the sentence d) "Reyna is indifferent to the mail carrier's presence." suggests a neutral feeling, not particularly positive or negative. In summary, sentences a and b clearly express Reyna's positive sentiments, whereas sentences c and d do not convey feelings towards the mail carrier as a person.