What led Nadira's family in the novel to seek asylum in Canada? Who suggested this plan of action?

Tim first introduced the family to the concept of the Special Registration. When Abba heard about immigrants fleeing to Canada for asylum, he asked why wait for them to kick his family out. He wanted to live in a place where he could hold his head high. One evening, Abba decided to chart a course to Canada where they needed to go and apply for asylum.