In many traditional farming societies, young boys commonly begin to make a substantial contribution to the household around age:

The answer that best completes the statement above is 15 YEARS OLD. This is the age that young boys commonly start in making substantial contribution to the household in most traditional farming societies. This is to prepare them as future household leaders by gaining more experience at a younger age. This is also the same with women as well.

Justice and equality, meaning everyone is equal no matter the color of their skin or their persoanlity and everyone has equal rights and is treated fairly.   hope this ! ^.^-ella   < 3