The answer is Caste system (A)
It nearly became extinct by a combination of commercial hunting and slaughter in the 19th century and introduction of bovine diseases from domestic cattle. With a population in excess of 60 million in the late 18th century, the species was down to just 541 animals by 1889.
I don’t understand
Can you explain it more clear please
North Carolina’s railroad lines grew rapidly in 1860
