The fur trade began in the 1500's as an exchange between Indians and Europeans. The Indians traded furs for such goods as tools and weapons. Beaver fur, which was used in Europe to make felt hats, became the most valuable of these furs.
Answer:
Cohort study or prospective observational study
Explanation:
the Framingham study involves collected data from participants, their children and grand children at intervals over a long period of time.
a cohort study is aclinical research study in which people are examined over a period of time and compared with another group of people who are not under the study.
Answer:
San Francisco, San Bernardino, Riversdale, Los Angeles , Big Sur, Sierra Nevada
Explanation:
All of these areas are located near the Two major faults in united states San Andreas and San Jacinto.
These faults creates a lot of friction/movement that made more than 80% of the total slip rate between the North American plates. These regions are considered to be very active and dangerous since many scientist believe they are capable to produce massive quakes with magnitudes of 8 or 9, which will create massive destruction to the cities located on top of them.
The answer is B. A grain of sand.
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