The factors that accounted for the population growth are birth date, death rate, immigration, and emigration.
The following information should be considered:
- The birth date deals with the no of babies born at the particular time period. If there is an increase in the birth rate, so the population should increase and vice versa.
- The death rate deals with the no of deaths during a particular time period. If the death rate is increased so the population should decrease and vice versa.
- Immigration deals with the movement of the people are in the place. If immigration is increased so the population should be high.
- Emigration means the movement of the people that are out of the place. If it is increased so the population is decreased.
Therefore we can conclude that the factors that accounted for the population growth are birth date, death rate, immigration, and emigration.
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Answer:
Human activity - Produces greenhouse gasses.
Greenhouse gasses - Cause atmosphere to trap more heat.
Sun's output - Can vary.
Ice age - Peaked 20,000 years ago.
Explanation:
Human activity includes the usage of fossil fuels on a very large scale, and by using them we release huge amounts of greenhouse gasses into the atmosphere.
The greenhouse gasses have the ability to trap the heat that is reflected from the surface of the planet, thus keeping more of it in the atmosphere and causing global temperature rise.
The sun is technically a star, thus an object that produces energy and light, and like every star, it has variations in its activity in accordance with the processes going on on it.
There have been numerous ice ages through the geological past, and the last one of them ended only around 10,000 years ago, with its peak being just 20,000 years ago.
The answer would most likely be Sea-floor spreading because sea-floor spreading mostly occurs at divergent boundaries.
Economic growth and development