The heat process caused by the uneven distribution of thermal energy in earth's interior is called

ridge push

mantle convection

slab pull

convection

Convection.

Explanation:

The heat process caused by the uneven distribution of thermal energy is Earth's interior is called convection. The heating of the lower atmosphere is primarily the result of distribution of heat through convection.  Convection is the process by which air rises or sink because of the difference of temperature. Convection generally occur when gases heated at uneven temperature.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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.