After the ice recedes, buried in the moraine and eventually
in geologic layers below will be an unnatural concentration
of a reddish metal, which briefly had assumed the form of
wiring and plumbing. then it was hauled to the dump and
returned to the earth. the next toolmaker to arrive or
evolve on this planet might discover and use it, but by then
there would be nothing to indicate that it was us who put it
there.
which claim does the excerpt most clearly support?
o
a. cities provide ecosystems just like forests and deserts.
o
b. humanity's impact on the word

to save the day, harry must get past a scary three-headed guard dog.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

can you take a picture of the passage so i can answer your question