Question

which statement primarily appeals to ethos to support the position that schools should eliminate long summer vacations in favor of a year - round calendar?
despite the opposition from students that a year - long schedule would surely cause, eliminating long summer vacations would provide a number of important benefits, including improved student learning outcomes.
although it may come as a surprise, i would prefer a year - round school schedule to our current system. as an academically competitive high school junior, i would appreciate a shorter summer break, since it would help limit the typical summer \memory loss.\
long summer breaks are famously associated with relaxation so extreme that it verges on sloth, as students sleep until noon and spend hours lounging with friends.

Explanation:

Ethos is an appeal to credibility or character. The second statement uses the speaker's identity as an academically competitive high school junior (establishing credibility) to support the argument for a year - round calendar. The first statement is more of a general claim about benefits (could be logos - appeal to logic). The third statement is more of a description (could be pathos - appeal to emotion in a negative way about summer break).

Answer:

The second statement ("Although it may come as a surprise... limit the typical summer'memory loss.'")