Answer:
option d is correct. the existence of land bridges between continents.
Explanation:
landland bridge theory which was used to explain why species would end up continents over, such as mammoth travelling to North America, thisthis theory was based on the idea that water eventually Rose to cover these bridges rather than the at having individual plates that moved away from each other.
Answer:Biodiversity. The variety of organisms in a given area. Succession. The replacement of one community by another at a single place over a period of time. Pioneer Species.
Explanation:
Answer:
People drink water that has been contaminated by animal feces
Explanation: