Asap (15 points)

in which of the following ways are the conditions around deep sea vents similar to the conditions that existed on early earth?

a) only ultraviolet light can reach the depth of the deep sea vents making it much like the light on early earth.
b) the volcanic gases released from the deep sea vents are similar to those released into the early atmosphere.
c) water around the deep sea vents contains low concentrations of iron sulfide just as the early oceans did.
d) the water at the depth of the deep sea vents were as cold as the early oceans.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

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