Along with earth’s crust, which portion of the upper mantle forms the

tectonic plates

preservation because he preserves part of the land and preserves means save

explanation:

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.