A student is using the electromagnetic spectrum to design a device for human communication. The student needs
a wave that has more energy than a radio wave and less energy than an infrared wave. Determine which wave the
student should choose, and describe the wavelength and frequency of the wave compared to a radio wave and
infrared wave.

The student would use ultraviolet waves since they have a shorter wavelength and higher frequency and therefore have less
energy than infrared waves.

The student would use microwaves since they have a shorter wavelength and higher frequency and therefore have more
energy than radio waves.

The student would use microwaves since they have a longer wavelength and higher frequency and therefore have more
energy than radio waves.

The student would use ultraviolet waves since they have a longer wavelength and higher frequency and therefore have less
energy than infrared waves.

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.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?