Give a method for the disposal of household wastes such as left-over food, fruit and vegetable peels, and leaves of potted plants.

There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meant and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food. (a) Which organism is (i) omnivore (ii) herbivore, and (iii) carnivore ? (b) Which organism is an autotroph ? (c) Which organism is/are heterotrophs(s) ? (d) Which organism can be a producer ? (e) Which organism is/are consumer (s)? (f) Give one example each of organisms which could be like (i) A (ii) B (iii) C, and (iv) D