Answer:
competition
Explanation:
because one die and the other lives
The answer is A: Mass extinction.
"Abrupt disappearance of many land and marine species" = extinction of many species.
It is known as structurlism
Answer: Biochemical engineers conduct studies on cells, proteins, viruses, or other biological substances to determine optimal conditions for growth or inhibitors that can stop or kill. They develop and conduct experiments to observe interactions of raw materials with each other and in specific environments.
Explanation: Hope this helps :)