The correct answer is the second answer:
population increases.
The demographic transition model describes how a population of a country transitions from high birth and death rates to low birth and death rates, as a country becomes more industrialized. This transition occurs through five stages (refer to attached image). In the second stage of the <span>demographic transition model, a country's population increases because birth rates continue to increase, while death rates fall considerably. </span>
The Treaty of Paris marked the end of the Revolutionary War. This was a peace treaty signed in Paris between Great Britain and America.
It ended conflict between France and Great Britain over the control of North America which led to France giving up all its territories in mainland North America and ending any foreign military threat to the British colonies
Real gross domestic product (GDP) is an inflation-adjusted measure that reflects the value of all goods and services produced by an economy in a given year, expressed in base-year prices, and is often referred to as "constant-price," "inflation-corrected" GDP or "constant dollar GDP."
https://www.investopedia.com/terms/r/realgdp.asp