If the crust of the earth is thin and can be ruptured, a can form. a. landslide b. volcano c. earthquake d. geyser

B) Volcano
As a landslide, an earthquake, and a geyser are all of a result of other factors other than the crust being ruptured.

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

Ithink that’s it’s b