C. concentration; moves from areas of high concentration to areas of low\
Answer: The predator is an organism that lives by feeding on other organisms, while prey is usually the organism that is hunted or killed for food.
Water enter and leaves the cell by osmosis, which is a specific example of diffusion. <span />
A detritivore is a animal that feeds on dead organic matter. A good example for a detritivore will be option C "Earthworm." A Earthworm feeds on dead organic matter such as dead plants, animals, rotten fruit, etc...
Hope this helps.