Trace historic reasons for the increase in global populations by selecting all correct answers.

around 8,000 bc people learned to farm and raise animals.

in the 15th century, plants from the americas were taken to europe to provide new foods.

in the 16th century, inventions such as tractors made farming easier.

life expectancy increased with treatment for diseases.

medicines became available around the time of columbus.

there can be more then one answer.

The correct answers are A) around 8,000 BC people learned to farm and raise animals. B) in the 15th century, plants from the Americas were taken to Europe to provide new foods, and D) life expectancy increased with treatment for diseases.  

The historical reasons for the increase of global populations are: around 8,000 BC people learned to farm and raise animals. B) in the 15th century, plants from the Americas were taken to Europe to provide new foods, and D) life expectancy increased with treatment for diseases.  

Life expectancy has been increasing with the pass of the years due to farming and raising animals at the beginning of humanity until the treatment of diseases due to better nutrition and more and effective medicine. Nowadays it is common to know that are people in their 80s that live a normal life and can be expected to live until their mid-90s.

the correct answer is

d) rocket launcher

i am only doing this for the points.