Avariety of structural adaptations called provides protection for an organism by copying the appearance of another species. a. mutations c. homologous structures b. mimicry d. parasites

b. mimicry

Explanation:

Mimicry is an adaptive feature of animals or plants to mimic another organism to gain advantage. Among the main aims of mimicry is protection against predators. There are also other functions, such as taking advantage of mating, feeding or confusing prey.

Mimicry occurs through a variety of structural adaptations that provide protection for an organism by copying the appearance of another species.

The mimic organism uses strategies such as following color pattern, odor, sound emission and physical characteristics of the model organism. Insects are the examples of organisms that make the most of mimicry. For adaptations, they rely on chemical, physical and behavioral characteristics.

Natural selection is the process responsible for making mimetic species

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.

i dont know it at allnow im just getting points at this pint