The brightness of a star as seen from earth is referred to as the what brightness.

Apparent Magnitude

Explanation:

Star's brightness is determined in terms of absolute or apparent magnitude. The apparent magnitude of star is the brightness of star with reference to what is observed from the Earth. The absolute magnitude of the star is the apparent magnitude of star if the star is at distance of 10 parsec. Thus, The brightness of a star as seen from Earth is referred to as the Apparent Magnitude.

apparent  on EDGEN.

Explanation:

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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im guessing the west of station b