Consider the graph below and choose the correct answer from the following statements. 1. Migration has always been the main driver of population growth in Christchurch. 2. Natural increase refers to new births and immigration.2. Natural increase refers to new births and immigration. 3. Population change remained positive. 4. Apart from the 2006-13 period, the population of Christchurch continues to increase. 5. Option 1&2 6. Option 3 & 4.