Steven hawking is on record as saying that viruses can be considered a form of life. considering the list above, what might be his evidence ?

 C

Explanation:

Items 4 - 7

Viruses metabolize; they change and mutate which could be considered development; they replicate in the host cells; and they respond to their environment-consider lytic and lysogenic cycles. They do not have a cellular structure,

C)Items 4 - 7

Explanation:

Items 4 - 7

Viruses metabolize; they change and mutate which could be considered development; they replicate in the host cells; and they respond to their environment-consider lytic and lysogenic cycles. They do not have a cellular structure,

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

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.