Flatworm<span>, also called platyhelminth, any of the phylum Platyhelminthes, a group of soft-bodied, usually much flattened invertebrates. A number of </span>flatworm<span> species are free-living, but about 80 percent of all </span>flatworms<span> are parasitic—i.e., living on or in another organism and securing nourishment from it.</span>
The answer is C. lymphocytes
Reducing - buying digital books instead of paperback
Reusing- repairing broken toys, appliances and accessories
Recycling- disposing of paper products in bins labeled paper only
Erosion can de-form/ruin landforms, & for sediment, it can erupt the rock cycle.
Hope this helped! :D