Read this scenario and then answer the question. NASA would like to send a probe to Europa, one of Jupiter’s moons. Europa’s icy surface is hundreds of meters thick, with a possible liquid ocean beneath. Scientists know little else about the surface of this moon. If NASA sends a probe, the probe will land on the moon’s surface, melt its way through the ice, penetrate the surface, and explore the liquid ocean. At the same time, it will record data and take videos and photograph

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

not too sure but maybe in the hot springs.

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.