Final answer:
The description in Rhys' "Pioneers, Oh, Pioneers," of men wearing dark trousers in the heat highlights their preference for English cultural conformity over personal comfort.
Step-by-step explanation:
Referring to men wearing dark trousers even when temperatures are high suggests they prioritize cultural conformity over personal comfort. This clothing choice is likely indicative of alignment with English customs and decorum, which often values appearance and tradition over practicality. This detail is a means to showcase the extent to which characters are willing to adhere to their cultural norms, emphasizing how the norms of English culture have permeated their identity to the point of overlooking the practicality of dressing for the climate.