Consider the following migration scenario:

Although she had many friends and family members in Brazil that she would miss, Helena decided to leave her home country and move to Canada. Her job prospects in Brazil were poor, and she figured that there were better opportunities for her to work as a dentist in Canadaeven though moving to Canada would cost her several thousands of dollars. To leave Brazil, Helena just had to file some minor paperwork; getting into Canada was hardershe had significant challenges getting Citizenship and Immigration Canada to accept her as an immigrant. However, Helena was ultimately successful in migrating to Canada and now has her own dental practice in Vancouver.

Apply the push-pull model of migration (and its component concepts/terms) to describe Helena's migration from Brazil to Canada.