Concept:The three words must be placed correctly to make the sentence logically describe sunlight, atmosphere, and daylight.
Explanation:The sentence is about sunlight passing through the atmosphere.
The first blank after "scattered and" should be "filtered" (B) because sunlight is filtered through the atmosphere.
The second blank after "and is" should be "obvious" (A) because sunlight becomes obvious as daylight.
The third blank after "above the" should be "horizon" (C) because the Sun is above the horizon.
Thus the correct order is B, A, C, which is option BAC.
The rearranged sentence reads: "On Earth, sunlight is scattered and filtered through Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon."
Answer:Option A. BAC