What the series of horsts and grabens tell us about the dominant stress being applied to the crust of the region is that the normal faults producing the horst/graben structures tell us it is tension.
Horsts and grabens, in geology, refer to topography that consists of alternating raised and lowered fault blocks. Horst and graben are created by normal faulting and rifting, which is caused by crustal extension.
A section of crust that has been lifted relative to the blocks on either side is called a horst while a section of crust that has lowered relative to the blocks on either side is called a graben.
Your question is incomplete because the multiple choices are missing. These were most likely the multiple choices given:
In that case, the correct option would be b.
Learn more about horsts and grabens here: https://brainly.com/question/28908275
#SPJ4
