The answer is A. Man-made
Answer:
D. in Animals the cell membrane pinches together
Explanation:
The Northern Elephant Seal population fell to fewer than 100 individuals due to overhunting during the 19th century. Although their numbers have recovered, the bottleneck effect of reduced genetic variation limits their potential to adapt to future environmental changes.
It’s discover that plants and animale are mad of cells
Each one pH increase is 10x less hydrogen ions and 10x more hydroxide ion, so a pH of 10 is 10^3 = 1000x less hydrogen atoms and 1000x more hydroxide ions than a pH of 7.