What does this description help a reader understand?

how scientists locate black holes
the speed of light in space

how scientists locate different galaxies

how scientists bend light

I'm not sure but I think the answer would be A (how scientists locate black holes). Hope this helps!!!

Explanation:

He is using figurative language. when you look at trees, young or old, it looks like they never move. they just sit there. and the old trees look like they were there forever. such as a poem I read named Evangeline. in the poem, the author describes the oak trees an "Druids of old."  Druids were a very old order of priests.