It is helpful to study the light that comes off stars because C. The light from a star gives hints of what elements make up a star.
B. so light can shine through it from below.
I would think A. Reduce Environmental Impacts.
If you build and populate more zoos, some of the endangered species might not be able to survive in captivity
If you introduce new predators they are going to kill all the endangered species and if you pass new laws about land use some people may kill the species
