List any four practices which help in protecting our environment.
(i) Rain water harvesting.
(ii) Plantation of trees.
(iii) Use of alternate service of energy plants or other herbivore for their food are termed consumers, i.e., humans, tiger, frog, etc.
(iv) All the interacting organisms in an area together with the non-living constituents of the environment form an ecosystem. Man made ecosystem: Garden and aquarium