Explanation:
For number 1: Nationalism is the identification with somebody's own nation and also to support it's interests.
For number 2: It caused intense competition among many nations with each seeking to overpower the other, a more stronger nation takes control or dominates a weaker country or territory.
For number 3: Positive incomes: promotes a sense of identity, unites people, promotes pride.
Negative incomes: leads to conflict with others, infringes on rights of others, creates xenophobia—the fear that someone will take them over.
Hope this is helpful!
