Question

read the following selection from the introduction paragraphs 1 - 3.
black holes are some of the most mysterious objects in the universe. a black hole is a region of space.
what does \mysterious\ refer to?
(a) the fact that black holes take up a lot of space
(b) the fact that not a lot is known about black holes
(c) the opinion that black holes are very interesting
(d) the opinion that black holes are dangerous

Explanation:

The word "mysterious" generally implies a lack of knowledge or understanding. In the context of black holes, it refers to the fact that they are not well - understood. Option A is incorrect as the text only says a black hole is a region of space, not that it takes up a lot of space. Option C and D are about opinions (interesting and dangerous) rather than the core meaning of mysterious (lack of knowledge). Option B aligns with the idea that "mysterious" means not a lot is known.

Answer:

B. the fact that not a lot is known about black holes