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.
22 minutes and 22 seconds , by a German man in 2012.
Trading allows us to also have a way of cultural connections in which we share our races and religion and spread awareness of it. So many people would have got to know Islam through trading due to cultural connections. Hope this helped!!
The river Nile
the amazon river
the river Ganges
the river Thames
hope this helps you<span />