PLEASE HELP What sentence structure follows the following pattern

subject + verb + dependent clause

Example of dependent clause:

I'm not tidying the dishes unless Sarah helps.

Unless Sarah helps is your dependent clause because can't stand alone as sentences. 

the rigid outer part of the earth, consisting of the crust and upper mantle is the lithosphere.     answer   crust and outer part of the mantle.

i think the answer is c. there are many strengths

i hope this and if its correct mark me brainliest