Red squirrels and gray squirrels have been the native species on an island for many years. a few years ago, black squirrels entered this island. the black squirrel is an invasive species. invasive species aren’t native to the ecosystem. they move into an ecosystem because of natural changes or human intervention. red squirrels and black squirrels have identical food requirements, but gray squirrels have a different diet. what three effects will these events have on the island’s squirrel population? -the food availability of red squirrels may increase. -the red and black squirrels will have to compete for nutrition. -the food availability for gray squirrels will not be affected. -the food availability for red squirrels may decrease. -the food availability for gray squirrels will be affected.

The THREE effects on the island's squirrel will be The red and black squirrels will have to compete for nutrition:

answer; i believe the correct answer is (replication is not conservative);

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.