Answer:
d. watching children play in a park and recording their behavior
Explanation:
Naturalistic observation is one of the methods used in research by the psychologists. The subjects in this experiment are observed in their natural environment. The behaviors are then analyzed and examined to draw certain conclusions out of them. Such researches help in getting a better conclusion and idea about the reaction ad behavior of the people.
Answer
With Cattle.
Explanation
Aryan was ancient people specifically called Indo-Iranian from areas around Caspian Sea. There great influence was on the formation of ancient Indian-Iran relationship .This group of individuals existed during the times when there was no writing thus most of their history was not documented. Economically, Aryan raised cattle, sheep and goats though they also farmed crops for trade with other tribes. The most vital indicator of wealth was Cattle and the more the number of cattle possessed by a family the more wealthy the family was, thus the cattle was later made illegal to be killed because of its importance.
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It was the "Transcontinental railroad" that great helped to further the Westward Expansion in the United States after 1865, since although it wasn't oficially completed until 1869, it began to reach further and further west beginning at this time.
