1. B A reduction in competition.
2. C. Respiratory system
The correct answer form what I think should be c I apologize if not
Answer:
hello i think b not completely sure
Explanation:
The continents that are now separated by the Atlantic Ocean once formed a single landmass.
All of our current continents were once connected as one single landmass named Pangea. Pangea broke apart into different continents. Fossils found in Africa have been found in South America, and etc.
