In what two plate tectonic settings do most volcanoes occur

The answer to your question is Divergent and Convergent

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

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.