The 2 types of bone markings being identified would be the opening on the occipitomastoid suture in which the internal jugular veins would travel to carry the blood from one's brain to the heart and the Mandibular condyle of the mandible that would then form the temporomandibular joint.
Change to the landscape from construction. The answer is c because if there is construction, they are probably building something on top of what used to be that ecosystem.
