How does the underlined sentence on
page 4 contribute to the meaning of the
passage?
The sentence gives the author's reasons for
why there are so few Blue Zones around the
world.
The sentence describes the kinds of
environments that produce Blue Zones.
The sentence reveals the author's regret that
Blue Zones are limited to certain
geographical areas.
The sentence suggests that physical land
features define the edges of Blue Zones.
