Answer:
It depends on the rice. Also, this is not a biology question ! Go ask Gordan Ramsey lol
Explanation:
In a crime scene where blood is present using dna fingerprinting would be useful because it was not only tell you if that person was related to the victim/or was the victim but who that person is
Well, if it's an environmental community: Erosion changes the shape of the landscape. New plants grow in, small streams may form. New creatures moving in may also shape the community over time.
In a civilized community: New people in power, of course. Also, new people moving in and out. Hope I helped!