Synthetic organic pigments are derived from coal tars and other petrochemicals. Inorganic pigments are made by relatively simple chemical reactions—notably oxidation—or are found naturally as earths. Inorganic pigments include white opaque pigments used to provide opacity and to lighten other colours.
Answer: B. Poachers are killing the animals for their ivory.
Poaching is the ill practice of illegegal hunting, killing , capturing of animals for deriving valuable like horns, skins, hives, fur from them or removing animals from their actual habitat for obtaining land for human use. Poaching involves illegal trade of these animal valuables in national and international markets. As, it involves killing and intentional injuries to animals it is considered as criminal practice.The main threat to the survival of elephant species is poaching. The ivory is a hard, white material obtain from the tusks or teeth of elephants. The ivory is utilized for production of art, ornaments and decorative items which are sold in higher costs in markets. Therefore, poachers are illegally killing elephants to derive tusks from them.
