Which statement is evidence of the effects of the availability of resources on the number of wolves or caribou? A. When there were not enough caribou to eat in 1999, the wolf population increased.

B. When there was more food to eat in 1989, the number of wolves in a pack increased.

C. When there was less food available in 2009, the number of caribou and wolves remained constant.

D. When there was more food available in 2012, there was a decrease in the number of wolves and caribou.

It's B.

Explanation:

B. When there was more food to eat in 1989, the number of wolves in a pack increased.

If there's less prey, then there will also be less predators. If there's more, then more predators.

Because, as seen in the graph, it's the only thing that makes sense.

(Then again, it looked kinda blurry to me.)

Still hope this helps though.

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.