When neighborhood residents noticed a large number of dead fish in a local creek, they traced the cause to a nearby gas station. the leaking fluid was entering the stream and killing the fish. this is an example of
groundwater pollution
nonpoint-source pollution
point-source pollution
thermal pollution
is it

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.

not only is it colder, it also becomes darker, less salty, and more dense.