The graph above depicts the human population of the world from 1050 to 2050 (projected). With an ever increasing human population, we pose a threat to our own planet in many ways. In terms of sustainability, which of these is not vital to this population growth? A) the air quality is deteriorating B) our natural resources are depleting C) birth control policies should be strictly enforced D) the food industry can't keep up with the demand of a growing population

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.