HELP Which of the following best explains the reason humans migrate from one location to another? (3 points) I think is A
Resource availability
Improved worldwide health care
Improved sanitary conditions
Lack of technological advances

i'm pretty sure it's spores

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.