Diffusion<span> is a spontaneous movement of particles from an area of high concentration to an area of low concentration. ... </span>Osmosis<span> is the spontaneous net movement of water across a semipermeable membrane from a region of low solute concentration to a more concentrated solution, up a concentration gradient.
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I would go with c because its tells you right in there that the ecosystem help who lives around that area.
Answer:
secondary consumer
Explanation:
They are the least because they play a less important role in the ecosystems.