1. Migration that can bring new allcles into a population. A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

2. Chance and random events that can reduce the variation in small population.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

3. Individuals with inherited characteristics that allow them to best compete for limited resources will survive and have more offspring than those individuals with variations that are less able to compete. Because characteristics are inherited, these traits will be better represented in the next generation.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

4. Leads to traits that may not be well suited to the environment but increase fitness.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

5. Ultimate source of brand new alleles in a population.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

i think that the best answer would be c.

tell me if im wrong : )

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 believe it would be c: tons.