The answer to your question is DRIED PLANT MATTER ❤️
Metal, metal, nonmetal, metal, nonmetal, nonmetal. For the covalent bonds, it's always between nonmetals. For the ionic, it's a metal and a nonmetal. Hope this helps!
Coal mining is known for in Australia. Hope this helps! Happy Studying!
(i) a. igneous
(ii) b. core
(iii) b. minerals
(iv.) a. sedimentary rock
(v.) b. crust