Questão 2

Read the text below to answer question.

    Alaska's tragically high number of suicide may be
related to cosmic storms and the Northern Lights
(aurora borealis), according to an expert $\in$ the study
of brainwaves.
[05]    Depression $\in$ the Far North has $\in$ general been
attributed to the deep, dark and long winters.
But Dr Anita Bush , ________ specialises $\in$
electroencephalography, has complicated matters by
discovering a link between solar flames and brainwave
[10] activity $\in$ two sets of Alaskans she has studied for the
past five years.
    The microscopic electric impulses were
concentrated $\in$ an area of the brain known also to
cause seasonal affective depression (SAD), the
[15] condition up to now blamed for dozens of suicides each
year $\in$ the remote Alaskan coast. Suicide levels among
the state's 15 to 24-year-olds have risen sharply $\in$
recent years, to six times the national average, says
Dr Bush.
[20]    She has not yet demonstrated a link between
increased brainwaves and suicidal tendencies but she
thinks existing data on supposed SAD cases may $\in$
fact include cases of suicide induced by geomagnetism.
For now she has suggested that special dark glasses,
[25] worn against solar flames and the Northern Lights,
________ elevate morale among the suicidal.
Some of her sceptical colleagues as Professor Tom
Hallinan, one of a team studying the aurora, recently
insisted that the most serious health risk $\in$ watching
[30] the Alaskan night sky was a cricked neck.

Adapted from Advance Your English - Cambridge University Press

One of the causes of the high number of suicides $\in$ the Far North may be the