Although there is not a complete record of ancient life on Earth for the past 3.5 billion years, scientists have still been able to construct a history of life. Where do scientists obtain the majority of their modern knowledge about the history of life?

fossils

Explanation:

Scientist obtain majority of their modern day knowledge about the history of life through the study of fossils.

well its not not rising unemployment and falling inflation.

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hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.