Answer:
In Late 1600s Anton von Leeuwenhoek develops a more powerful microscope that allows him to see living cells like bacteria.
In Early 1800s Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells.
Explanation:
The answer is b it is being bred for a trait that is favored by humans
B. trenches .......................
