Which of the following students is demonstrating safe practices while performing a field investigation? 1. jason picks an unknown wild berry and eats it. ii. kayla drinks unpurified water from a stream. iii. michael wanders off alone to search for a plant. iv. naomi observes a mockingbird in a tree but does not touch it. a. i, ii, iii, and iv • b. i and ii only c. ii, iii, and iv only d. iv only

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every el niño cycle is different. every year.

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.