What is teddy's organization trying to accomplish?
teddy is working for a nonprofit organization that urges people to stop using products with cfcs. through this initiative, teddy's organization hopes to reduce the concentration of in the atmosphere.

Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this initiative, Teddy's organization hopes to reduce the concentration of greenhouse gases in the atmosphere.

Explanation:

Greenhouse gases can be described as gases which are harmful to the Earth. The abundant emission of these gases causes the ozone layer to get destroyed. The depletion of the ozone layer will make life impossible on Earth as the harmful rays of the Sun will destroy the atmosphere and life would become impossible.

Greenhouse gases can be natural gases like carbon dioxide, methane etc or they can be man-made like CFC's.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

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.