B. Families.i had this same question in my class :] hope it helps!
When defining regions, geographers avoid using subjective information in determining boundaries. This includes opinions and perceptual information. So the answer is Subjective information.
Answer:
Astronomers used the cross-staff for measuring the angle between the directions of two stars. ... Ships' officers used it to measure the elevation angle of the noontime Sun above the horizon, which allowed them to estimate their latitude
Explanation:
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The clynical warming of the pacific ocean near the equator