Answer: A. before history was written.
Explanation:
I'm not sure if you need an explanation, but prehistoric means "very old or out of date." Hope this helps, Good luck! :)
<span>D) reduce the amount of electricity he uses.( good luck m8 tell me if I'm wrong</span>
One example of irradiation solving a societal problem might be the way
in which it is able to prevent diseases in food. Using small amount of
radiation, the bacteria and insects that would otherwise be carrying
harmful bacteria can be killed. This will solve a societal problem, in
that food wastage and illness due to food poisoning in poverty-stricken
areas are massive problems faced in our society.
Decomposition of organic matter (i.e. dead plant and animal remains) in soils is an important process in any ecosystem. As organic matter is decomposed, water, carbon dioxide and nutrients are released