How are species related to the concept of biodiversity?

Biologists most often define biodiversity as the "totality of genes, species, and ecosystems of a region".
So if you have a bunch of species of the same kind of animal then that animal would be considered biodiverse. This is a kinda basic concept, and thus hard to elaborate on; you just have to understand what the words mean.

The answer would be cstep by step explanation: all of the other animals developed their features while the salamander was born with them

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.