Answer:
It allowed them to progress their culture and technology
Explanation:
Answer: OBSERVATIONAL STUDY
Explanation: Observational study as used in social sciences, psychology and statistics can be defined as a research in which the variable that is changed or manipulated in an experiment, is not under INFLUENCE/CONTROL of the researcher.
This is usually done due to logistical restrictions and or due to ethical reasons.
Some types of Observational study are;
Case Control study
Cross sectional study
Longitudinal study.
An example of Observational study will be observers stationed at a supermarket to see how much processed food versus fresh food was purchased.
What is your question? This seems more like a statement...
Answer:
He established the empire's boundaries along natural physical features. Troops were stationed along with the frontier areas of the Rhine River, Danube River, the Atlantic Ocean, the Sahara, and the Euphrates River to protect the empire from invaders.
Explanation:
So, by using natural boundaries
Answer:
Alaska and vast areas of northern Canada and Russia.
Explanation:
Arctic tundra occurs north of the arctic circle and south of the antarctic circle. It covers much of Alaska and vast areas of northern Canada and Russia. It is also found along the northern coast of Antarctica
