سوال ۸۴ کنکور ارشد مدیریت کسب‌وکار (MBA) ۱۴۰۲

Passage summary: Seawater collected for reverse osmosis is taken to a holding basin and introduced as the input to treatment. This input needs cleaning because its impurities can damage the membranes. The author identifies this water with a technical name before describing the initial filtration steps.

Relevant wording: “the feed water, as it is now called”.

The underlined word “it” in paragraph 2 refers to which of the following?