ILL MARK A model of a typical food web is shown here. Extensive pesticide spraying has taken place and the arthropods, which comprise the insect population in the area, have been wiped out. How might the model of the food web change initially, based on this information?
A)decreased animals
B)decreased plant population
C)increased birds, decreased animals
D)increased nematodes, decreased animals

D) increased nematodes, decreased animals.

Explanation:

WIth fewer things to eat, animals will likely die out, and with nothing to control the growth of nematodes, their population with grow rapidly and out of control.

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.