Answer:
Genetics
Continental drift
Explanation:
The genetics knowledge which is a library of traits serves as an information center which can be used to analyse evolution was not available to Darwin.
The knowledge of continents being a giant raft floating on molten rock that could fit into a puzzle was not available to Darwin that could solve the solve the existence of oddly similar terrestrial species on separate continents.
They would sing a song to hypnotize then and drag them to the bottom of the ocean and they would drown
Systematic deportation and gas vans
I don't really know but Im going to guess true.