The swift population rise in the last 2,000 years was caused by an increase in food supply. disease immunity. technological advances. access to birth control education.

technological advances.

Explanation: Looking back at the world's population, it is possible to draw a comparison between past, present, and future. About 300 million people were the world's population about 2,000 years ago. The population remained without presenting significant growth over long periods since there were moments of increase in the population growth and others of deep declines. Currently, the world population growth rate of less than 1.2% per year is steadily declining. However, life expectancy is on the rise due to technological advances in medicine, environmental sanitation, major health concerns, among other factors. As a result, the number of people in the world continues to increase. Population growth should occur significantly only in developing countries, in the case of developed countries, the changes will be modest.

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.