The three age system is useful for the study of

chronology

the three age are stone age bronze age and iron age.

artifacts and events of late prehistory and early history could be ordered into a chronology.

the answer is ancient European cultures

Explanation:

harding's opponent in the 1920 election was ohio governor and newspaperman james m. cox, who had won the democratic nomination in a 44-ballot convention battle. harding rejected the progressive ideology of the wilson administration in favor of the laissez-faire approach of the mckinley administration.

ford’s revolution of the assembly like to make cars less expensive

explanation: