Aras 6: bina satu model alat pemadam api ringkas yang boleh berungs
uam api ringkas yang boleh berfungsi di rumah dengan menggunakan
bahan kitar semula. alat tersebut mesti boleh memadamkan api y
tersebut mesti boleh memadamkan api yang berpunca dari dapur gas dan
minyak.

A lot of toxins in a coral reef could influence natural selection so it would become like survival of the fittest. Then the fish would develop certain traits to better protect themselves (less prey means predators would takes bigger measures to get food). This would also cause a decrease genetic variation because there wouldn't be as much fish left. Since the coral reef went from unique to dull from toxins.