What role does biodiversity play in ecosystems resilience? actually environmental science own words please need it now

i know can you plzz me with this question im sorry i didt answer your question i just need hel.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.