Read the following paragraph from the section "Producers."
Plants are the most
familiar type of
autotroph, but there are
many other kinds.
Algae, whose larger
forms are known as
seaweed, are
autotrophic.
Phytoplankton, tiny
organisms that live in
the ocean, are also
autotrophs. Some types
of bacteria are
autotrophs. For
example, bacteria living
in active volcanoes use
sulfur, not carbon
dioxide, to produce
their own food. This
process is called
chemosynthesis.
What conclusion is BEST supported
by this paragraph?