Afault generally occurs at a convergent boundary

A strike-slip fault.  

Explanation:

A strike-slip fault is a type of tectonic movement that follows an occurring fracture in a parallel manner. There are two types of strike-slip faults: dextral (right-lateral) and sinistral (left-lateral). In dextral strike-slip faults, the tectonic movement would move to the right – remember its location is still parallel to the location of the fracture in the earth’s surface. In sinistral strike-slip faults, it would move to the left.  

During an earthquake, under your feet, you might feel it as if the earth is moving towards either the right or the left.  

answer; i believe the answer is (polygenic inheritance;

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.