~over hunting has killed a lot of species
~we genetically modify plants and animals to our liking
~we have introduced a lot of invasive species to different places effecting local wildlife
Answer:
It is Biosphere.
The Biosphere --contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth. Within the biosphere, living things form ecological communities based on the physical surroundings of an area.
Number 2 Is less oxygen and fish will die
Answer:
for classifying organisms and studying biodiversity
Explanation: