3. Living organisms play an important role in reshaping Earth. For example, decomposers consume dead organisms and release important materials back into
the soil. Look at the pictures available and list what organisms in this ecosystem
are decomposers? p.133

the index of refraction of the second medium is higher. i just took the test trust me !

i need

carbon atoms, hydrogen, oxygen, and nitrogen.

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.