Before revision: For example, plankton use solar energy to grow and thrive; whales obtain energy by eating plankton, thus indirectly using solar energy as well, but this time in a much more concentrated and higher quality form.
After revision: rainwater drives the erosion of rocks, which liberates chemicals that can be used as nutrients; these are taken up byFor example, plankton use solar energy to grow and thrive; whales obtain energy by eating plankton, thus indirectly using solar energy as well, but this time in a much more concentrated and higher quality form.