Creator of the Assembly line —> Henry Ford
First Major Mail-Order catalog —> Tiffany and Company
Major seller of mail-order homes —> Sears
First mail order catalog seen in the U.S —> Montgomery Ward
President of General Motors —> Alfred Sloan
First mass produced vehicle in the U.S —> Model T
The harsh climatic conditions experienced vin Africa. the climate in Africa is not the same as the one in the Europeans countries. the change of this climate really affected the well being and the Europeans.
The language barrier was another challenge that the European encountered they were unable to communicate with Africans.
Answer:
I'm not sure about this one, but the answer could possibly be agriculture!
Explanation:
Ramakrishna, originally called Gadadhar Chatterji or Gadadhar Chattopadhyaya, (born February 18, 1836, Hooghly [now Hugli], Bengal state, India—died August 16, 1886, Calcutta [now Kolkata]), Hindu religious leader, founder of the school of religious thought that became the Ramakrishna Order.
One way is by using relative dating which is determined by comparing it's placement to fossils in other layers of rock to tell how old or young it is compared to the other ones.
Another way is radioactive dating and this can be done by calculating the age of a sample based on the amount of remaining radioactive isotopes it contains.