An &quot;ecosystem&quot; is made of living and non-living components Components of a food chain Humans have altered their environment, both in positive and negative ways, either for themselves or for other living things 
(ecosystem&quot; is made; of living and non-living components Components of) (a food chain Humans; have altered; their environment)
ecosystem&quot a food chain Humans
is made have altered
of living and non-living components Components of
their environment