What is a result of seasonal change

during seasonal change the precipitation and temperature affect soil moisture, evaporation rates, river flows, lake levels, and snow fall. leaves fall and plants wither as cold and dry seasons approach;these changes in vegetation affect the type and amount of food available for humans and other organisms.

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.