In Alaska, salmon feed on tiny plants called phytoplankton. During late summer, salmon gather in rivers to reproduce. Grizzly bears visit these rivers to feed on the large number of salmon. what is the role of each organism in this food chain?

correct answer is a. and d.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

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.