If someone shoves my shoulders and stretches my rectus abdominis muscles (anterior abdominal muscles), then my stretch reflex will occur causing... O contraction of my rectus abdominis and relaxation of antagonist muscles in my back contraction of my rectus abdominis and also of antagonist muscles in my back o relaxation of my rectus abdominis and contraction of antagonist muscles in my back relaxation of my rectus abdominis and also of antagonistmuscles in my back

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.