The earliest event from these was:
753 BCE: City of Rome founded
Then this happened:
509 BCE: Roman republic founded
Then:
27 BCE: Roman Empire established
After which:
410 CE: Alaric seized Rome
And finally:
476 CE: Odoacer sacked Rome
You can figure out the chronological order by looking if it has either CE or BCE - BCE is before Christ and CE is after Christ. When counting from BCE it goes from higher numbers towards zero. When counting from CE it goes from zero to higher numbers again.
Reading books and writting.
Answer:
Ethnographic
Explanation:
Ethnography is a qualitative research that deals with the in-depth study of a culture or facet of culture. The observer in this type of research method also become a participant, he misses with the culture or people he/she intends to study so that he/she can have a detailed report about the subject of study.
Answer: Nitrogen oxides are present in combustion and industrial processes.
Explanation: We are talking about the combustion of coal, oil and gasoline by the emission of vehicles such as ships, airplanes trucks and automobiles, which is specially significant in big cities where there is more traffic . For the industry part there are the electric power plants and large industrial operation plants.
