The correct answer to fill in the blanks is "wavelength."
Answer:
I believe the answer is A
They are called colonies.
The village life in America is from primary source.
The primary source is formed by economic activities related to the collection or extraction and transformation of natural resources with little or no manipulation. The main activities of the primary sector are agriculture, livestock, forestry, beekeeping, aquaculture, hunting, fishing and mining. Usually, primary products are used as raw material in industrial production
