Black holes themselves can not be seen, nor do they leave trails (since emptiness does not have to be caused by a black hole), but there is evidence for black holes: scientists can see the effects of their gravity on nearby stars. The answer is B.
I'm sorry, did you answer your own question or do you still need clarification?
I think the correct answer from the choices listed above is option B. According to geographers, there are two kinds of location would be absolute or relative. Absolute<span> location is a place's exact spot on a map. </span>A relative location is the position of something relative to another landmark.
Answer:
resolve ongoing sectional debate?
