Question

when the campaign around richmond intensified, the prison commandant clamped down on visitors, forbidding any conversation during visits. undeterred by the strict prison rules, van lew found ways to continue her intelligence swap with the prisoners. she realized, for example, that the books she frequently brought for the prisoners could offer a variety of ways to exchange information. she could tuck enciphered messages down a book’s spine. she also developed another way of using books to conceal secret messages. she opened a book to a prearranged page and made a pinhole above each letter on that page that spelled out her secret message. prisoners could easily respond in the same way.—the dark game, paul b. janeczkowhat is the topic of this paragraph?van low and the prisonerswhat is the central idea of this paragraph?van lew thought of creative ways to spywhich detail points to the central idea?‘clamped down on visitors’‘forbidding any conversation’‘made a pinhole above each letter’

Explanation:

The central idea is that Van Lew found creative ways to spy (exchange intelligence) with prisoners despite strict rules. The detail "made a pinhole above each letter" is part of her creative method (using books to conceal secret messages), so it supports the central idea. The other details ("clamped down on visitors", "forbidding any conversation") describe the strict rules, not her creative spying methods.

Answer:

made a pinhole above each letter