The provided line graph depicts the modification in population size, birth rate and death rate over a 300-year span, starting from 1700.
Generally, it is evident that the population size followed an upward trend throughout the period. Furthermore, the birth rate and death rate fluctuated over 20 and 40 million people over the span.
Looking at the graph more closely, the population size started with the lowest number of people in 1700 before increasing significantly until the end of the period, except for a plateau of 10 million people was seen from 1750 to 1800. Besides, a similar pattern was seen for both birth rate and death rate, starting from nearly 27 and 30 thousand people in the first year, respectively. They grew significantly in the following 50 years before reaching a plateau from 1750 to 1800.
Meanwhile, the population size rose continually and surpassed the other two categories in 1900 before reaching a peak of 50 million people in 2000. Moreover, a dramatic decline was seen in both birth rate and death rate in 1900, while the death rate remained stable until the end of the period, a significant ascend was seen in the birth rate in the last year, reaching its peak of approximately 35 thousand people.