Oh boy, there's many, many, many, many...
(many x100)
many ways!
One way is to take shorter showers and conserve water wherever you go, at home, at a restaurant, hotel, etc.
Another way is to not litter on the streets.
Or, spread the word and tell everyone to conserve water, not litter, or just anything to help the environment!
DNA is the correct answer.
Hope it helps!
Humans are formed through sexual reproduction, some people think we just came him unknowingly and others think evolution where we come from apes, but scientist proved that humans are made through reproduction.