Answer:
"A black hole can only be observed or detected at a short distance"-Even this statement is not correct exactly but better compared to others
this answer is the closest.
Explanation:
We can't say this "Even though there is light inside a black hole, it is not visible" exactly because a Blackhole has a lot of gravitational pull which exceeds speed of light. So light can't escape a blackhole
"Even though a black hole has gravity, there is nothing inside a black hole"- I actually am not sure because this question hasn't been answered yet. There is a point on the centre of the black where an infinite amount of mass is confined to a infinitely small volume due to which this point has infinite amount of density. This is called a singularity. We don't know if all the information is contained there or lost.
I have seen a few videos say that Information inside the blackhole is lost. But I guess we can't be sure about it
"A black hole can only be observed or detected at a short distance" -This is kind of correct but I guess it is not entirely correct
"A black hole only releases light that appears black to the eyes"-This is definitely wrong since there is no light coming out
I answered this from a physics point of view not English
