Which question are scientist trying to answer?

97

1 What is the universe made of?

Astronomers face an embarrassing conundrum: they don’t know what 95% of the universe is made of. Atoms, which form everything we see around us, only account for a measly 5%. Over the past 80 years it has become clear that the substantial remainder is comprised of two shadowy entities – dark matter and dark energy. The former, first discovered in 1933, acts as an invisible glue, binding galaxies and galaxy clusters together. Unveiled in 1998, the latter is pushing the universe’s expansion to ever greater speeds. Astronomers are closing in on the true identities of these unseen interlopers.

Explanation: Astronomers are trying to figure this out because they are seeing these shadow entities that just disappear when they get close

i can see why you would be confused because two answers could go to this.

Explanation:

well the first choice, and last choice could be two possible answers, i would think the question that scientists are trying to answer would have to be the first option, why does lava come from this volcano everyday?.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

the question isn't complete here so i can't right an answer '_'